MongoDB 入门篇

1.1 数据库管理系统

　　　　在了解MongoDB之前需要先了解先数据库管理系统

1.1.1 什么是数据？

　　数据（英语：data），是指未经过处理的原始记录。

　　一般而言，数据缺乏组织及分类，无法明确的表达事物代表的意义，它可能是一堆的杂志、一大叠的报纸、数种的开会记录或是整本病人的病历纪录。数据描述事物的符号记录，是可定义为意义的实体，涉及事物的存在形式。是关于事件之一组离散且客观的事实描述，是构成讯息和知识的原始材料。

1.1.2 什么是数据库管理系统？

　　数据库管理系统（英语：database management system，缩写：DBMS） 是一种针对对象数据库，为管理数据库而设计的大型电脑软件管理系统。

　　具有代表性的数据管理系统有：Oracle、Microsoft SQL Server、Access、MySQL及PostgreSQL等。通常数据库管理师会使用数据库管理系统来创建数据库系统。

　　现代DBMS使用不同的数据库模型追踪实体、属性和关系。在个人电脑、大型计算机和主机上应用最广泛的数据库管理系统是关系型DBMS（relational DBMS）。在关系型数据模型中，用二维表格表示数据库中的数据。这些表格称为关系。

　　数据库管理系统主要分为俩大类：RDBMS、NOSQL

　　关于RDBMS的更多信息参考：http://www.cnblogs.com/clsn/category/1131345.html

1.1.3 常见数据库管理系统？

常见的数据库管理系统，及其排名情况如下：

1.2 NoSQL是什么？

1.2.1 NoSQL简介

　　NoSQL是对不同于传统的关系数据库的数据库管理系统的统称。

　　两者存在许多显著的不同点，其中最重要的是NoSQL不使用SQL作为查询语言。其数据存储可以不需要固定的表格模式，也经常会避免使用SQL的JOIN操作，一般有水平可扩展性的特征。

　　NoSQL一词最早出现于1998年，是Carlo Strozzi开发的一个轻量、开源、不提供SQL功能的关系数据库。

**　　2009****年**，Last.fm的Johan Oskarsson发起了一次关于分布式开源数据库的讨论，来自Rackspace的Eric Evans再次提出了NoSQL的概念，这时的NoSQL主要指非关系型、分布式、不提供ACID的数据库设计模式。

　　2009年在亚特兰大举行的"no:sql(east)“讨论会是一个里程碑，其口号是"select fun, profit from real_world where relational=false;"。因此，对NoSQL最普遍的解释是“非关联型的”，强调Key-Value Stores和文档数据库的优点，而不是单纯的反对RDBMS。

　　基于2014年的收入，NoSQL市场领先企业是MarkLogic，MongoDB和Datastax。基于2015年的人气排名，最受欢迎的NoSQL数据库是**MongoDB，Apache Cassandra和Redis**.

1.2.2 NoSQL数据库四大家族

NoSQL中的四大家族主要是：列存储、键值、图像存储、文档存储，其类型产品主要有以下这些。

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    <strong><span style="color: white; mso-themecolor: background1;" lang="EN-US">NoSQL</span></strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">最终一致性键值存储</span></strong>
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    <span lang="EN-US">Cassandra</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Dynamo</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Riak</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Hibari</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Virtuoso</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Voldemort</span>
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    <span lang="EN-US">Memcached</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Redis</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Oracle Coherence</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">NCache</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US"> Hazelcast</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Tuple space</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Velocity</span>
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    <span lang="EN-US">BigTable</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">LevelDB</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Tokyo Cabinet</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Tarantool</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">TreapDB</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Tuple space</span>
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    <span lang="EN-US">MongoDB</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">CouchDB</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">SimpleDB</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US"> Terrastore </span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US"> BaseX </span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Clusterpoint </span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US"> Riak</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">No2DB</span>
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    <span lang="EN-US">FlockDB</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">DEX</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Neo4J</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">AllegroGraph</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">InfiniteGraph</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">OrientDB</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Pregel</span>
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    <span lang="EN-US">Hbase</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Cassandra</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Hypertable</span>
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1.2.3 NoSQL的优势

　　高可扩展性、分布式计算、没有复杂的关系、低成本

　　架构灵活、半结构化数据

1.2.4 NoSQL与RDBMS对比 

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    <strong><span style="font-size: 18.0pt; color: white; mso-themecolor: background1;" lang="EN-US">RDBMS</span></strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">没有声明性查询语言</span> </strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">没有预定义的模式</span> </strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">键</span><span lang="EN-US"> - </span></strong><strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">值对存储，列存储，文档存储，图形数据库</span> </strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">最终一致性，而</span></strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-weight: bold;">非</span><span lang="EN-US">ACID</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; mso-bidi-font-weight: bold;">属性</span>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">非结构化和不可预知的数据</span> </strong>
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    <strong><span lang="EN-US">CAP</span></strong><strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">定理</span> </strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">高性能，高可用性和可伸缩性</span></strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">高度组织化结构化数据</span> </strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">结构化查询语言（</span><span lang="EN-US">SQL</span></strong><strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">）</span><span lang="EN-US"> (SQL) </span></strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据和关系都存储在单独的表中。</span> </strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据操纵语言，数据定义语言</span> </strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">严格的一致性</span> </strong>
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    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">基础事务</span> </strong>
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1.3 MongoDB简介

1.3.1 MongoDB是什么

　　　　MongoDB并非芒果的意思，而是源于 Humongous（巨大）一词。

1.3.2 MongoDB的特性

　　MongoDB的3大技术特色如下所示：

除了上图所示的还支持：

　　二级索引、动态查询、全文搜索 、聚合框架、MapReduce、GridFS、地理位置索引、内存引擎 、地理分布等一系列的强大功能。

但是其也有些许的缺点，例如：

　　多表关联： 仅仅支持Left Outer Join

　　SQL 语句支持： 查询为主，部分支持

　　多表原子事务： 不支持

　　多文档原子事务：不支持

　　16MB 文档大小限制，不支持中文排序 ，服务端 Javascript 性能欠佳

1.3.3 关系型数据库与mongodb对比

存储方式对比

     在传统的关系型数据库中，存储方式是以表的形式存放，而在MongoDB中，以文档的形式存在。

   数据库中的对应关系，及存储形式的说明

MongoDB与SQL的结构对比详解

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      <span style="font-size: 18pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; color: white; mso-themecolor: background1;" lang="EN-US">MongoDB Terms/Concepts</span></strong></span>
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      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">database</span></strong></span>
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      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">database</span>
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      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">table</span></strong></span>
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      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">collection</span>
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      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">row</span></strong></span>
    </p>
  </td>
  
  <td style="width: 58.02%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt; text-align: center;" valign="top" width="58%">
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">document or BSON document</span>
    </p>
  </td>
</tr>

<tr>
  <td style="width: 41.98%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="41%">
    <p class="MsoNormal">
      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">column</span></strong></span>
    </p>
  </td>
  
  <td style="width: 58.02%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt; text-align: center;" valign="top" width="58%">
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">field</span>
    </p>
  </td>
</tr>

<tr>
  <td style="width: 41.98%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt; text-align: center;" valign="top" width="41%">
    <p class="MsoNormal">
      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">index</span></strong></span>
    </p>
  </td>
  
  <td style="width: 58.02%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt; text-align: center;" valign="top" width="58%">
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">index</span>
    </p>
  </td>
</tr>

<tr>
  <td style="width: 41.98%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="41%">
    <p class="MsoNormal">
      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">table joins</span></strong></span>
    </p>
  </td>
  
  <td style="width: 58.02%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt; text-align: center;" valign="top" width="58%">
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">embedded documents and linking</span>
    </p>
  </td>
</tr>

<tr>
  <td style="width: 41.98%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt; text-align: center;" valign="top" width="41%">
    <p class="MsoNormal">
      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">primary key</span></strong></span>
    </p>
    
    <p class="MsoNormal">
      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">Specify any unique column or</span></strong></span>
    </p>
    
    <p class="MsoNormal">
      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">column combination as </span></strong></span>
    </p>
    
    <p class="MsoNormal">
      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">primary key.</span></strong></span>
    </p>
  </td>
  
  <td style="width: 58.02%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt; text-align: center;" valign="top" width="58%">
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">primary key</span>
    </p>
    
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">In MongoDB, the primary key is </span>
    </p>
    
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">automatically set to the _id field.</span>
    </p>
  </td>
</tr>

<tr>
  <td style="width: 41.98%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt; text-align: center;" valign="top" width="41%">
    <p class="MsoNormal">
      <span style="font-size: 14pt;"><strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">aggregation (e.g. group by)</span></strong></span>
    </p>
  </td>
  
  <td style="width: 58.02%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt; text-align: center;" valign="top" width="58%">
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">aggregation pipeline</span>
    </p>
    
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">See the SQL to Aggregation Mapping </span>
    </p>
    
    <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
      <span style="font-family: 'Yu Gothic UI Semibold', sans-serif; font-size: 14pt;" lang="EN-US">Chart.</span>
    </p>
  </td>
</tr>

1.3.4 MongoDB数据存储格式

JSON格式

　　JSON 数据格式与语言无关，脱胎于 JavaScript，但目前很多编程语言都支持 JSON 格式数据的生成和解析。JSON 的官方 MIME 类型是 application/json，文件扩展名是 .json。

　　MongoDB 使用JSON（JavaScript ObjectNotation）文档存储记录。

　　JSON数据库语句可以容易被解析。

　　Web 应用大量使用，NAME-VALUE 配对

BSON格式

　　BSON是由10gen开发的一个数据格式，目前主要用于MongoDB中，是MongoDB的数据存储格式。BSON基于JSON格式，选择JSON进行改造的原因主要是JSON的通用性及JSON的schemaless的特性。 

　　二进制的JSON，JSON文档的二进制编码存储格式

　　BSON有JSON没有的Date和BinData

　　MongoDB中document以BSON形式存放

例如：

1.3.5 MongoDB的优势

 　　 ? MongoDB是开源产品

 　　 ? On GitHub Url：https://github.com/mongodb

 　 　?  Licensed under the AGPL，有开源的社区版本

 　　 ? 起源& 赞助by MongoDB公司，提供商业版licenses 许可

   　　这些优势造就了mongodb的丰富的功能：

　　JSON 文档模型、动态的数据模式、二级索引强大、查询功能、自动分片、水平扩展、自动复制、高可用、文本搜索、企业级安全、聚合框架MapReduce、大文件存储GridFS

1.3.6 高可用的复制集群

　　自动复制和故障切换

　　多数据中心支持滚动维护无需关机支持最多50个成员

1.3.7 水平扩展

　　这种方式是目前构架上的主流形式，指的是通过增加服务器数量来对系统扩容。在这样的构架下，单台服务器的配置并不会很高，可能是配置比较低、很廉价的 PC，每台机器承载着系统的一个子集，所有机器服务器组成的集群会比单体服务器提供更强大、高效的系统容载量。

　　这样的问题是系统构架会比单体服务器复杂，搭建、维护都要求更高的技术背景。分片集群架构如下图所示：

1.3.8 各存储引擎的对比

<td style="width: 13.56%; border-top-width: 1pt; border-top-color: #9bbb59; border-left: none; border-bottom-width: 1pt; border-bottom-color: #9bbb59; border-right: none; background: #9bbb59; padding: 0cm 5.4pt; height: 38.4pt;" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 1;">
    <strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; color: white; mso-themecolor: background1; mso-font-kerning: 0pt;" lang="EN-US">MySQL InnoDB</span></strong>
  </p>
</td>

<td style="width: 13.62%; border-top-width: 1pt; border-top-color: #9bbb59; border-left: none; border-bottom-width: 1pt; border-bottom-color: #9bbb59; border-right: none; background: #9bbb59; padding: 0cm 5.4pt; height: 38.4pt;" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 1;">
    <strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; color: white; mso-themecolor: background1; mso-font-kerning: 0pt;" lang="EN-US">MySQL NDB</span></strong>
  </p>
</td>

<td style="width: 14.32%; border-top-width: 1pt; border-top-color: #9bbb59; border-left: none; border-bottom-width: 1pt; border-bottom-color: #9bbb59; border-right: none; background: #9bbb59; padding: 0cm 5.4pt; height: 38.4pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 1;">
    <strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; color: white; mso-themecolor: background1; mso-font-kerning: 0pt;" lang="EN-US">Oracle</span></strong>
  </p>
</td>

<td style="width: 18.88%; border-top-width: 1pt; border-top-color: #9bbb59; border-left: none; border-bottom-width: 1pt; border-bottom-color: #9bbb59; border-right: none; background: #9bbb59; padding: 0cm 5.4pt; height: 38.4pt;" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 1;">
    <strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; color: white; mso-themecolor: background1; mso-font-kerning: 0pt;" lang="EN-US">MongoDB MAPI</span></strong>
  </p>
</td>

<td style="width: 19.3%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #9bbb59; border-right-color: #9bbb59; border-bottom-color: #9bbb59; border-left: none; background: #9bbb59; padding: 0cm 5.4pt; height: 38.4pt;" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 1;">
    <strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; color: white; mso-themecolor: background1; mso-font-kerning: 0pt;" lang="EN-US">MongoDB WiredTiger</span></strong>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; text-indent: 13.05pt; mso-char-indent-count: 1.0; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">ES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">ROW-level</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">ROW-level</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">ROW-level</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">Collection-level</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">Document-level</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 71.1pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 71.1pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES(From 7.3)</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 71.1pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 71.1pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 71.1pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 24.6pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">64TB</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">384EB</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto; mso-yfti-cnfc: 64;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">NO</span>
  </p>
</td>

<td style="width: 13.56%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 13.62%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="13%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 14.32%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="14%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES</span>
  </p>
</td>

<td style="width: 18.88%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="18%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES </span><strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">(</span></strong><span style="font-size: 13.0pt; font-family: 黑体; mso-bidi-font-family: 'Segoe UI'; mso-font-kerning: 0pt;">分片</span><strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">)</span></strong>
  </p>
</td>

<td style="width: 19.3%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt; height: 23.4pt;" nowrap="nowrap" width="19%">
  <p class="MsoNormal" style="margin: 0cm; margin-bottom: .0001pt; text-align: justify; text-justify: inter-ideograph; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <span style="font-size: 13.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">YES </span><strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">(</span></strong><span style="font-size: 13.0pt; font-family: 黑体; mso-bidi-font-family: 'Segoe UI'; mso-font-kerning: 0pt;">分片</span><strong><span style="mso-bidi-font-size: 12.0pt; font-family: 'Segoe UI',sans-serif; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt;" lang="EN-US">)</span></strong>
  </p>
</td>

1.3.9 数据库功能和性能对比

　　由下图可以看出MongoDB数据库的性能扩展能力及功能都较好，都能够在数据库中，站立一足之地。

1.3.10 MongoDB适用场景

　　网站数据、缓存等大尺寸、低价值的数据

　　在高伸缩性的场景，用于对象及JSON数据的存储。

1.3.11 MongoDB 慎用场景

<td style="width: 62.1%; border-top-width: 1pt; border-top-color: white; border-left: none; border-bottom-width: 3pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #c7daae; padding: 3.1pt 0.75pt 0cm; height: 41.4pt;" width="62%">
  <p class="MsoNormal" style="text-align: center;" align="center">
    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">原因</span></strong>
  </p>
</td>

<td style="width: 62.1%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #ecf2e5; padding: 2.9pt 0.75pt 0cm; height: 80.4pt;" width="62%">
  <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
    <span lang="EN-US">Hadoop</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">、</span><span lang="EN-US">Spark</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">提供更多分析运算功能和工具，并行计算能力更强</span>
  </p>
  
  <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
    <span lang="EN-US">MongoDB + Hadoop/Spark</span>
  </p>
</td>

<td style="width: 62.1%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #f5f8f3; padding: 3.9pt 0.75pt 0cm; height: 70.3pt;" width="62%">
  <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">不建索引查询太慢，索引太多影响写入及更新操作</span>
  </p>
</td>

<td style="width: 62.1%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #ecf2e5; padding: 3.1pt 0.75pt 0cm; height: 64.65pt;" width="62%">
  <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">关联支持较弱，事务较弱</span>
  </p>
</td>

<td style="width: 62.1%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #f5f8f3; padding: 3.9pt 0.75pt 0cm; height: 64.65pt;" width="62%">
  <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
    <span lang="EN-US">MongoDB&nbsp; </span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">事务支持仅限于本机的单文档事务</span>
  </p>
</td>

<td style="width: 62.1%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #ecf2e5; padding: 3.9pt 0.75pt 0cm; height: 64.65pt;" width="62%">
  <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
    <span lang="EN-US">MongoDB</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">换主节点时候会有短暂的不可写设计所限</span>
  </p>
</td>

1.3.12 什么时候该MongDB 

<td style="width: 32.84%; border-top-width: 1pt; border-top-color: white; border-left: none; border-bottom-width: 3pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #008f00; padding: 3.1pt 0.75pt 0cm; height: 34pt;" valign="top" width="32%">
  <p class="MsoNormal" style="margin-top: 3.1pt; margin-right: 0cm; margin-bottom: .0001pt; margin-left: 6.5pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;">
    <strong><span style="font-size: 18.0pt; font-family: 'Calibri',sans-serif; mso-fareast-font-family: 宋体; color: white; letter-spacing: -.05pt; mso-font-kerning: 0pt;" lang="EN-US">Yes/No?</span></strong>
  </p>
</td>

<td style="width: 32.84%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #ecf2e5; padding: 0.75pt 0.75pt 0cm; height: 49.3pt;" valign="top" width="32%">
  &nbsp;
</td>

<td style="width: 32.84%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #f5f8f3; padding: 0.75pt 0.75pt 0cm; height: 37.9pt;" valign="top" width="32%">
  &nbsp;
</td>

<td style="width: 32.84%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #ecf2e5; padding: 0.75pt 0.75pt 0cm; height: 37.9pt;" valign="top" width="32%">
  &nbsp;
</td>

<td style="width: 32.84%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #f5f8f3; padding: 0.75pt 0.75pt 0cm; height: 37.9pt;" valign="top" width="32%">
  &nbsp;
</td>

<td style="width: 32.84%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #ecf2e5; padding: 0.75pt 0.75pt 0cm; height: 37.9pt;" valign="top" width="32%">
  &nbsp;
</td>

<td style="width: 32.84%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #f5f8f3; padding: 0.75pt 0.75pt 0cm; height: 37.9pt;" valign="top" width="32%">
  &nbsp;
</td>

<td style="width: 32.84%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #ecf2e5; padding: 0.75pt 0.75pt 0cm; height: 37.9pt;" valign="top" width="32%">
  &nbsp;
</td>

<td style="width: 32.84%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: white; border-right-width: 1pt; border-right-color: white; background: #f5f8f3; padding: 0.75pt 0.75pt 0cm; height: 37.9pt;" valign="top" width="32%">
  &nbsp;
</td>

　　在上面的表格中进行选择，但有1个yes的时候：可以考虑MongoDB；当有2个以上yes的时候：不会后悔的选择！

1.4 MongoDB的部署

　　MongoDB官网：https://www.mongodb.com/

　　CentOS6.X版本软件下载地址：https://www.mongodb.org/dl/linux/x86_64-rhel62

　　　　其他版本请到进行官网下载。

1.4.1 安装前准备

　　在安装之前首先确认该版本软件是否支持你的操作系统。

　　　　更多详情查看：https://docs.mongodb.com/manual/installation/ 

<td style="width: 20.74%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #f5f6f7; border-right-color: #f5f6f7; border-bottom-color: #f5f6f7; border-left: none; background: #7f7f7f; padding: 9pt; height: 5.15pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <strong><span style="font-size: 10.5pt; font-family: 'Helvetica',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 宋体; color: white; mso-font-kerning: 0pt;" lang="EN-US">3.6 Community & Enterprise</span></strong>
  </p>
</td>

<td style="width: 20.8%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #f5f6f7; border-right-color: #f5f6f7; border-bottom-color: #f5f6f7; border-left: none; background: #7f7f7f; padding: 9pt; height: 5.15pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <strong><span style="font-size: 10.5pt; font-family: 'Helvetica',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 宋体; color: white; mso-font-kerning: 0pt;" lang="EN-US">3.4 Community & Enterprise</span></strong>
  </p>
</td>

<td style="width: 20.8%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #f5f6f7; border-right-color: #f5f6f7; border-bottom-color: #f5f6f7; border-left: none; background: #7f7f7f; padding: 9pt; height: 5.15pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <strong><span style="font-size: 10.5pt; font-family: 'Helvetica',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 宋体; color: white; mso-font-kerning: 0pt;" lang="EN-US">3.2 Community & Enterprise</span></strong>
  </p>
</td>

<td style="width: 20.8%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #f5f6f7; border-right-color: #f5f6f7; border-bottom-color: #f5f6f7; border-left: none; background: #7f7f7f; padding: 9pt; height: 5.15pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <strong><span style="font-size: 10.5pt; font-family: 'Helvetica',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 宋体; color: white; mso-font-kerning: 0pt;" lang="EN-US">3.0 Community & Enterprise</span></strong>
  </p>
</td>

<td style="width: 20.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #f5f6f7; border-right-width: 1pt; border-right-color: #f5f6f7; padding: 8.25pt 41.25pt 9pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <span style="font-size: 10.5pt; font-family: 'Segoe UI Symbol',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Segoe UI Symbol'; color: #494747; mso-font-kerning: 0pt;" lang="EN-US">✓</span>
  </p>
</td>

<td style="width: 20.8%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #f5f6f7; border-right-width: 1pt; border-right-color: #f5f6f7; padding: 8.25pt 41.25pt 9pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <span style="font-size: 10.5pt; font-family: 'Segoe UI Symbol',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Segoe UI Symbol'; color: #494747; mso-font-kerning: 0pt;" lang="EN-US">✓</span>
  </p>
</td>

<td style="width: 20.8%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #f5f6f7; border-right-width: 1pt; border-right-color: #f5f6f7; padding: 8.25pt 41.25pt 9pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <span style="font-size: 10.5pt; font-family: 'Segoe UI Symbol',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Segoe UI Symbol'; color: #494747; mso-font-kerning: 0pt;" lang="EN-US">✓</span>
  </p>
</td>

<td style="width: 20.8%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #f5f6f7; border-right-width: 1pt; border-right-color: #f5f6f7; padding: 8.25pt 41.25pt 9pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <span style="font-size: 10.5pt; font-family: 'Segoe UI Symbol',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Segoe UI Symbol'; color: #494747; mso-font-kerning: 0pt;" lang="EN-US">✓</span>
  </p>
</td>

<td style="width: 20.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #f5f6f7; border-right-width: 1pt; border-right-color: #f5f6f7; padding: 8.25pt 41.25pt 9pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <span style="font-size: 10.5pt; font-family: 'Segoe UI Symbol',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Segoe UI Symbol'; color: #494747; mso-font-kerning: 0pt;" lang="EN-US">✓</span>
  </p>
</td>

<td style="width: 20.8%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #f5f6f7; border-right-width: 1pt; border-right-color: #f5f6f7; padding: 8.25pt 41.25pt 9pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <span style="font-size: 10.5pt; font-family: 'Segoe UI Symbol',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Segoe UI Symbol'; color: #494747; mso-font-kerning: 0pt;" lang="EN-US">✓</span>
  </p>
</td>

<td style="width: 20.8%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #f5f6f7; border-right-width: 1pt; border-right-color: #f5f6f7; padding: 8.25pt 41.25pt 9pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <span style="font-size: 10.5pt; font-family: 'Segoe UI Symbol',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Segoe UI Symbol'; color: #494747; mso-font-kerning: 0pt;" lang="EN-US">✓</span>
  </p>
</td>

<td style="width: 20.8%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #f5f6f7; border-right-width: 1pt; border-right-color: #f5f6f7; padding: 8.25pt 41.25pt 9pt;" width="20%">
  <p class="MsoNormal" style="margin-top: 18.0pt; margin-right: 0cm; margin-bottom: 18.0pt; margin-left: 0cm; text-align: center; mso-line-height-alt: 9.0pt; mso-pagination: widow-orphan; layout-grid-mode: both; mso-layout-grid-align: auto;" align="center">
    <span style="font-size: 10.5pt; font-family: 'Segoe UI Symbol',sans-serif; mso-fareast-font-family: 宋体; mso-bidi-font-family: 'Segoe UI Symbol'; color: #494747; mso-font-kerning: 0pt;" lang="EN-US">✓</span>
  </p>
</td>

1.4.2 环境说明

系统环境说明：

软件版本说明

1.4.3 部署MongoDB

在root用户下操作

　　Transparent Huge Pages (THP)，通过使用更大的内存页面，可以减少具有大量内存的机器上的缓冲区（TLB）查找的开销。

　　但是，数据库工作负载通常对THP表现不佳，因为它们往往具有稀疏而不是连续的内存访问模式。您应该在Linux机器上禁用THP，以确保MongoDB的最佳性能。

创建用户

　　修改用户密码

创建程序目录

下载程序

解压程序

修改程序属主

　　切换到mongod用户，设置用户环境变量

　　   至此，MongoDB数据库部署完成

1.4.4 管理MongoDB

　　数据库的启动与关闭

   参数说明: 

<td style="width: 67.52%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #4f81bd; border-right-color: #4f81bd; border-bottom-color: #4f81bd; border-left: none; background: #4f81bd; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; color: white; mso-themecolor: background1;">参数说明</span></strong>
  </p>
</td>

<td style="width: 67.52%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据存放路径</span>
  </p>
</td>

<td style="width: 67.52%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">日志文件路径</span>
  </p>
</td>

<td style="width: 67.52%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">日志输出方式</span>
  </p>
</td>

<td style="width: 67.52%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">启用端口号</span>
  </p>
</td>

<td style="width: 67.52%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">在后台运行</span>
  </p>
</td>

<td style="width: 67.52%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">是否需要验证权限登录</span><span lang="EN-US">(</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">用户名和密码</span><span lang="EN-US">)</span>
  </p>
</td>

<td style="width: 67.52%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">限制访问的</span><span lang="EN-US">ip</span>
  </p>
</td>

<td style="width: 67.52%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" valign="top" width="67%">
  <p class="MsoNormal">
    <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">关闭数据库</span>
  </p>
</td>

登入数据库

使用配置文件的方式管理数据库：

**　　普通格式配置文件**：

   使用配置文件时的启动与关闭：

在数据库中关闭数据库的方法

<p class="a3" style="color: #000000;">
  > 关闭所有打开的连接
</p>

<p class="a3" style="color: #000000;">
  > 将内存数据强制刷新到磁盘
</p>

<p class="a3" style="color: #000000;">
  > 当前的操作执行完毕
</p>

<p class="a3" style="color: #000000;">
  > 安全停止
</p>

<p class="a3" style="color: #000000;">
  <strong>　　<span style="color: #ff0000;">切忌kill -9</span></strong>
</p>

<p class="a3">
  &nbsp;
</p>

<p class="a3" style="color: #000000;">
  &nbsp;　　数据库直接关闭，数据丢失，数据文件损失，修复数据库（成本高，有风险）
</p>

   使用kill****命令关闭进程

使用脚本管理mongodb服务

   注：该脚本可以直接在root用户下运行

<div id="cnblogs_code_open_a536c7f0-5f93-49a1-bde2-20c8eb3f49ad" class="cnblogs_code_hide">
  <pre><span style="color: #008080;"> 1</span> [root@MongoDB ~]# <span style="color: #0000ff;">cat</span>  /etc/init.d/<span style="color: #000000;">mongod  

2 #!/bin/bash 3 # 4 # chkconfig: 2345 80 90 5 # description:mongodb 6 # by clsn 7 # blog_url http://blog.nmtui.com 8 ################################# 9 10 MONGODIR=/application/mongodb 11 MONGOD=$MONGODIR/bin/mongod 12 MONGOCONF=$MONGODIR/conf/mongod.conf 13 InfoFile=/tmp/start.mongo 14 15 . /etc/init.d/functions 16 17 status(){ 18 PID=<span style="color: #0000ff;">awk</span> <span style="color: #800000;">'</span><span style="color: #800000;">NR==2{print $NF}</span><span style="color: #800000;">'</span><span style="color: #000000;"> $InfoFile 19 Run_Num=<span style="color: #0000ff;">ps</span> -p $PID|<span style="color: #0000ff;">wc</span> -<span style="color: #000000;">l 20 if [ $Run_Num -eq 2 ]; then 21 echo "MongoDB is running" 22 else 23 echo "MongoDB is shutdown" 24 return 3 25 fi 26 } 27 28 start() { 29 status &>/dev/null 30 if [ $? -ne 3 ];then 31 action "启动MongoDB,服务运行中…" /bin/false 32 exit 2 33 fi 34 sudo su - mongod -c "$MONGOD -f $MONGOCONF" >$InfoFile 2>/dev/null 35 if [ $? -eq ];then 36 action "启动MongoDB" /bin/true 37 else 38 action "启动MongoDB" /bin/false 39 fi 40 } 41 42 43 stop() { 44 sudo su - mongod -c "$MONGOD -f $MONGOCONF –shutdown" &>/dev/null 45 if [ $? -eq ];then 46 action "停止MongoDB" /bin/true 47 else 48 action "停止MongoDB" /bin/false 49 fi 50 } 51 52 53 case "$1" in 54 start) 55 start 56 ;; 57 stop) 58 stop 59 ;; 60 restart) 61 stop 62 sleep 2 63 start 64 ;; 65 status) 66 status 67 ;; 68 *) 69 echo $"Usage: $0 {start|stop|restart|status}" 70 exit 1 71 esac

<p>
  <span class="cnblogs_code_collapse">View Code 脚本管理mongodb服务</span><span style="background-color: #ffffff; font-family: 'PingFang SC', 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px;">&nbsp;</span></div> </div> 
  
  <h2>
    <span id="15_MongoDB">1.5 MongoDB的基本操作</span>
  </h2>
  
  <p>
    Mongodb中关键字种类：
  </p>
  
  <div>
    <blockquote>
      <p class="a3" style="color: #000000;">
        db（数据库实例级别）
      </p>
      
      <p class="a3" style="color: #000000;">
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;db本身
      </p>
      
      <p class="a3" style="color: #000000;">
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;db.connection 数据库下的集合信息
      </p>
      
      <p class="a3" style="color: #000000;">
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;db.collection.xxx(
      </p>
      
      <p class="a3" style="color: #000000;">
        rs（复制集级别）
      </p>
      
      <p class="a3">
        &nbsp;
      </p>
      
      <p class="a3" style="color: #000000;">
        sh（分片级别）
      </p>
    </blockquote>
  </div>
  
  <h3>
    <span id="151">1.5.1 查询操作</span>
  </h3>
  
  <p>
    在客户端指定数据库进行连接：（默认连接本机test数据库）
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>[mongod@MongoDB ~]$ mongo <span style="color: #800080;">10.0</span>.<span style="color: #800080;">0.152</span>/<span style="color: #000000;">admin

MongoDB shell version: 3.2.8 connecting to: 10.0.0.152/admin > db admin

  <p>
    查看当前数据库版本
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> db.version()

3.2.8

  <p>
    切换数据库
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> use test;

switched to db test

  <p>
    显示当前数据库
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> db

test > db.getName() test

  <p>
    查询所有数据库
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #808080;">></span><span style="color: #000000;"> show dbs;

clsn .000GB local .000GB test .000GB > show databases; clsn .000GB local .000GB test .000GB

  <p>
    查看clsn数据库当前状态
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> <span style="color: #0000ff;">use</span><span style="color: #000000;"> clsn;

> db.stats() { "db" : "clsn", "collections" : 1, "objects" : 10000, "avgObjSize" : 80, "dataSize" : 800000, "storageSize" : 258048, "numExtents" : , "indexes" : 1, "indexSize" : 94208, "ok" : 1 }

  <p>
    查看当前数据库的连接机器地址
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> db.getMongo()

connection to 127.0.0.1

  <h3>
    <span id="152">1.5.2 数据管理</span>
  </h3>
  
  <p>
    创建数据库
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> use clsn;</pre>
    </div>
  </div>
  
  <p>
    <strong><em><span style="text-decoration: underline;">说明：</span></em></strong>
  </p>
  
  <div>
    <blockquote>
      <div style="color: #000000;">
        <p class="a3">
          创建数据库：
        </p>
        
        <p class="a3">
          当use的时候，系统就会自动创建一个数据库。
        </p>
        
        <p class="a3">
          如果use之后没有创建任何集合。系统就会删除这个数据库。
        </p>
      </div>
    </blockquote>
  </div>
  
  <div>
    <p class="ac">
      删除数据库
    </p>
    
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> show dbs;

clsn .000GB local .000GB test .000GB > use clsn switched to db clsn > db.dropDatabase() { “dropped” : “clsn”, “ok” : 1 }

  <p>
    说明：
  </p>
  
  <div>
    <blockquote>
      <p class="a3" style="color: #000000;">
        删除数据库：
      </p>
      
      <p class="a3">
        &nbsp;
      </p>
      
      <p class="a3" style="color: #000000;">
        　　如果没有选择任何数据库，会删除默认的test数据库
      </p>
    </blockquote>
  </div>
  
  <p>
    <span style="background-color: #00ff00;"><strong>创建集合</strong></span>
  </p>
  
  <p>
    &nbsp;&nbsp; 方法一：
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #000000;">> use clsn;

switched to db clsn

db.createCollection(‘a’) { “ok” : 1 } db.createCollection(‘b’) { “ok” : 1 }

  <p>
    &nbsp;&nbsp; 查看当前数据下的所有集合
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> show collections;

a b > db.getCollectionNames() [ "a", "b" ]

  <p>
    方法二：
  </p>
  
  <p>
    　　当插入一个文档的时候，一个集合就会自动创建。
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> <span style="color: #0000ff;">use</span><span style="color: #000000;"> clsn;

switched to db clsn > db.c.insert({name:’clsn’}); WriteResult({ "nInserted" : 1 }) > db.c.insert({url:’http://blog.nmtui.com’}); WriteResult({ "nInserted" : 1 })

  <p>
    &nbsp;&nbsp; 查看创建的合集
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> db.getCollectionNames()

[ "a", "b", "c" ]

  <p>
    &nbsp;&nbsp; 查看合集里的内容
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> db.c.find()

{ "_id" : ObjectId("5a4cbcea83ec78b7bea904f8"), "name" : "clsn" } { "_id" : ObjectId("5a4cbcfc83ec78b7bea904f9"), "url" : "http://blog.nmtui.com" }

  <p>
    重命名集合
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> db.c.renameCollection(<span style="color: #800000;">"</span><span style="color: #800000;">clsn</span><span style="color: #800000;">"</span><span style="color: #000000;">)

{ "ok" : 1 } > db.getCollectionNames() [ "a", "b", "clsn" ]

  <p>
    &nbsp;&nbsp; 删除合集
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> db.a.drop()

true

db.getCollectionNames() [ "b", "clsn" ]

  <p>
    &nbsp;&nbsp; 插入1w行数据
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> <span style="color: #0000ff;">for</span>(i=<span style="color: #800080;"></span>;i&lt;<span style="color: #800080;">10000</span>;i++){ db.log.insert({<span style="color: #800000;">"</span><span style="color: #800000;">uid</span><span style="color: #800000;">"</span>:i,<span style="color: #800000;">"</span><span style="color: #800000;">name</span><span style="color: #800000;">"</span>:<span style="color: #800000;">"</span><span style="color: #800000;">mongodb</span><span style="color: #800000;">"</span>,<span style="color: #800000;">"</span><span style="color: #800000;">age</span><span style="color: #800000;">"</span>:<span style="color: #800080;">6</span>,<span style="color: #800000;">"</span><span style="color: #800000;">date</span><span style="color: #800000;">"</span>:<span style="color: #0000ff;">new</span><span style="color: #000000;"> Date()}); }

WriteResult({ "nInserted" : 1 })

  <p>
    查询集合中的查询所有记录
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> db.log.find()</pre>
    </div>
  </div>
  
  <p>
    注：默认每页显示20条记录，当显示不下的的情况下，可以用it迭代命令查询下一页数据。
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> DBQuery.shellBatchSize=<span style="color: #800080;">50</span><span style="color: #000000;">;    # 每页显示50条记录

50 app> db.log.findOne() # 查看第1条记录 app> db.log.count() # 查询总的记录数 app> db.log.find({uid:1000}); # 查询UUID为1000的数据

  <p>
    删除集合中的记录数
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>>  db.log.distinct(<span style="color: #800000;">"</span><span style="color: #800000;">name</span><span style="color: #800000;">"</span><span style="color: #000000;">)      #  查询去掉当前集合中某列的重复数据

[ "mongodb" ] > db.log.remove({}) # 删除集合中所有记录 WriteResult({ "nRemoved" : 10000 })
> db.log.distinct("name") [ ]

  <p>
    查看集合存储信息
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>><span style="color: #000000;"> db.log.stats()          # 查看数据状态

> db.log.dataSize() # 集合中数据的原始大小 > db.log.totalIndexSize() # 集合中索引数据的原始大小 > db.log.totalSize() # 集合中索引+数据压缩存储之后的大小 > db.log.storageSize() # 集合中数据压缩存储的大小

    <p class="ac">
      pretty()使用
    </p>
  </div>
  
  <div>
    <div class="cnblogs_code">
      <pre>> db.log.find({uid:<span style="color: #800080;">1000</span><span style="color: #000000;">}).pretty()

{ "_id" : ObjectId("5a4c5c0bdf067ab57602f7c2"), "uid" : 1000, "name" : "mongodb", "age" : 6, "date" : ISODate("2018-01-03T04:28:59.343Z") }

  <h2>
    <span id="16_MongoDB">1.6 MongoDB中用户管理</span>
  </h2>
  
  <p>
    　　MongoDB数据库默认是没有用户名及密码的，即无权限访问限制。为了方便数据库的管理和安全，需创建数据库用户。
  </p>
  
  <h3>
    <span id="161">1.6.1 用户的权限</span>
  </h3>
  
  <p>
    　　用户中权限的说明&nbsp;
  </p>
  
  <table class="MsoTable15Grid4Accent3" style="width: 100%; border-width: initial; border-style: none; border-color: initial;" border="1" cellspacing="0" cellpadding="0">
    <tr>
      <td style="width: 31.14%; border-top-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-top-color: #9bbb59; border-bottom-color: #9bbb59; border-left-color: #9bbb59; border-right: none; background: #9bbb59; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: center; mso-yfti-cnfc: 5;" align="center">
          <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; color: white; mso-themecolor: background1;">权限</span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #9bbb59; border-right-color: #9bbb59; border-bottom-color: #9bbb59; border-left: none; background: #9bbb59; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: center; mso-yfti-cnfc: 1;" align="center">
          <strong><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New'; color: white; mso-themecolor: background1;">说明</span></strong>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; background: #eaf1dd; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span lang="EN-US">Read&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">允许用户读取指定数据库</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span lang="EN-US">readWrite&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">允许用户读写指定数据库</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; background: #eaf1dd; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span lang="EN-US">dbAdmin&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">允许用户在指定数据库中执行管理函数，如索引创建、删除，查看统计或访问</span><span lang="EN-US">system.profile</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span lang="EN-US">userAdmin&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">允许用户向</span><span lang="EN-US">system.users</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">集合写入，可以找指定数据库里创建、删除和管理用户</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; background: #eaf1dd; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span lang="EN-US">clusterAdmin&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">只在</span><span lang="EN-US">admin</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据库中可用，赋予用户所有分片和复制集相关函数的管理权限。</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span lang="EN-US">readAnyDatabase&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">只在</span><span lang="EN-US">admin</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据库中可用，赋予用户所有数据库的读权限</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; background: #eaf1dd; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span lang="EN-US">readWriteAnyDatabase </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">只在</span><span lang="EN-US">admin</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据库中可用，赋予用户所有数据库的读写权限</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span lang="EN-US">userAdminAnyDatabase </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">只在</span><span lang="EN-US">admin</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据库中可用，赋予用户所有数据库的</span><span lang="EN-US">userAdmin</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">权限</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; background: #eaf1dd; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span lang="EN-US">dbAdminAnyDatabase&nbsp;&nbsp; </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; background: #eaf1dd; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">只在</span><span lang="EN-US">admin</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据库中可用，赋予用户所有数据库的</span><span lang="EN-US">dbAdmin</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">权限。</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 31.14%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #c2d69b; border-bottom-color: #c2d69b; border-left-color: #c2d69b; border-top: none; padding: 0cm 5.4pt;" width="31%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span lang="EN-US">root&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></strong>
        </p>
      </td>
      
      <td style="width: 68.86%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #c2d69b; border-right-width: 1pt; border-right-color: #c2d69b; padding: 0cm 5.4pt;" width="68%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">只在</span><span lang="EN-US">admin</span><span style="font-family: '微软雅黑',sans-serif; mso-ascii-font-family: 'Courier New'; mso-hansi-font-family: 'Courier New';">数据库中可用。超级账号，超级权限</span>
        </p>
      </td>
    </tr>
  </table>
  
  <p>
    　　&nbsp;更多关于用户权限的说明参照：https://docs.mongodb.com/manual/core/security-built-in-roles/
  </p>
  
  <p>
    <em><span style="text-decoration: underline;">用户创建语法</span></em>&nbsp;&nbsp;
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #000000;">{

user: "<name>", pwd: "<cleartext password>", customData: { <any information> }, roles: [ { role: "<role>", db: "<database>" } | "<role>", … ] }

  <p>
    语法说明：
  </p>
  
  <div>
    <blockquote>
      <p class="a3" style="color: #000000;">
        user字段：用户的名字;
      </p>
      
      <p class="a3" style="color: #000000;">
        pwd字段：用户的密码;
      </p>
      
      <p class="a3" style="color: #000000;">
        cusomData字段：为任意内容，例如可以为用户全名介绍;
      </p>
      
      <p class="a3" style="color: #000000;">
        roles字段：指定用户的角色，可以用一个空数组给新用户设定空角色；
      </p>
      
      <p class="a3">
        &nbsp;
      </p>
      
      <p class="a3" style="color: #000000;">
        roles 字段：可以指定内置角色和用户定义的角色。
      </p>
    </blockquote>
  </div>
  
  <h3>
    <span id="162">1.6.2 创建管理员用户</span>
  </h3>
  
  <p>
    进入管理数据库
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> <span style="color: #0000ff;">use</span> admin</pre>
    </div>
  </div>
  
  <p>
    创建管理用户，root权限
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #000000;">db.createUser(

{ user: "root", pwd: "root", roles: [ { role: "root", db: "admin" } ] } )

  <p>
    <span style="color: #ff0000;"><strong>注意：</strong></span>
  </p>
  
  <blockquote>
    <p style="color: #000000;">
      &nbsp;&nbsp;&nbsp;　　创建管理员角色用户的时候，必须到admin下创建。
    </p>
    
    <p>
      &nbsp;
    </p>
    
    <p style="color: #000000;">
      &nbsp;&nbsp;　　&nbsp;删除的时候也要到相应的库下操作。
    </p>
  </blockquote>
  
  <p>
    查看创建完用户后的collections；
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre> ><span style="color: #000000;"> show tables; 

system.users # 用户存放位置 system.version

  <p>
    <strong>查看创建的管理员用户</strong>
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>    ><span style="color: #000000;"> show users
{
    </span><span style="color: #800000;">"</span><span style="color: #800000;">_id</span><span style="color: #800000;">"</span> : <span style="color: #800000;">"</span><span style="color: #800000;">admin.root</span><span style="color: #800000;">"</span><span style="color: #000000;">,
    </span><span style="color: #800000;">"</span><span style="color: #800000;">user</span><span style="color: #800000;">"</span> : <span style="color: #800000;">"</span><span style="color: #800000;">root</span><span style="color: #800000;">"</span><span style="color: #000000;">,
    </span><span style="color: #800000;">"</span><span style="color: #800000;">db</span><span style="color: #800000;">"</span> : <span style="color: #800000;">"</span><span style="color: #800000;">admin</span><span style="color: #800000;">"</span><span style="color: #000000;">,
    </span><span style="color: #800000;">"</span><span style="color: #800000;">roles</span><span style="color: #800000;">"</span><span style="color: #000000;"> : [
        {
            </span><span style="color: #800000;">"</span><span style="color: #800000;">role</span><span style="color: #800000;">"</span> : <span style="color: #800000;">"</span><span style="color: #800000;">root</span><span style="color: #800000;">"</span><span style="color: #000000;">,
            </span><span style="color: #800000;">"</span><span style="color: #800000;">db</span><span style="color: #800000;">"</span> : <span style="color: #800000;">"</span><span style="color: #800000;">admin</span><span style="color: #800000;">"</span><span style="color: #000000;">
        }
    ]
}</span></pre>
    </div>
  </div>
  
  <p>
    验证用户是否能用
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>> db.auth(<span style="color: #800000;">"</span><span style="color: #800000;">root</span><span style="color: #800000;">"</span>,<span style="color: #800000;">"</span><span style="color: #800000;">root</span><span style="color: #800000;">"</span><span style="color: #000000;">)

1 # 返回 1 即为成功

  <p>
    用户创建完成后在配置文件中开启用户验证
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>cat >>/application/mongodb/conf/mongod.conf&lt;&lt;-<span style="color: #800000;">'</span><span style="color: #800000;">EOF</span><span style="color: #800000;">'</span><span style="color: #000000;">

security: authorization: enabled EOF

  <p>
    重启服务
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>/etc/init.d/mongod  restart</pre>
    </div>
    
    <p>
      　　<span style="background-color: #ffff00; color: #ff0000;"><strong>登陆测试，注意登陆时选择admin</strong><strong>数据库</strong></span>
    </p>
  </div>
  
  <p>
    　　　<span style="color: #ff0000;">　注意：</span>用户在哪个数据库下创建的，最后加上什么库。
  </p>
  
  <p>
    方法一：命令行中进行登陆
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>[mongod@MongoDB ~]$ mongo -uroot -<span style="color: #000000;">proot admin 

MongoDB shell version: 3.2.8 connecting to: admin >

  <p>
    方法二：在数据库中进行登陆验证：
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>[mongod@MongoDB ~<span style="color: #000000;">]$ mongo 

MongoDB shell version: 3.2.8 connecting to: test > use admin switched to db admin > db.auth("root","root") 1

show tables; system.users system.version

  <h3>
    <span id="163">1.6.3 按生产需求创建应用用户</span>
  </h3>
  
  <p>
    <span style="background-color: #ffff00;"><strong>创建对某库的只读用户</strong></span>
  </p>
  
  <p>
    &nbsp;&nbsp; 在test库创建只读用户test
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #0000ff;">use</span><span style="color: #000000;"> test

db.createUser( { user: "test", pwd: "test", roles: [ { role: "read", db: "test" } ] } )

  <p>
    &nbsp;&nbsp; 测试用户是否创建成功
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>db.auth(<span style="color: #800000;">"</span><span style="color: #800000;">test</span><span style="color: #800000;">"</span>,<span style="color: #800000;">"</span><span style="color: #800000;">test</span><span style="color: #800000;">"</span><span style="color: #000000;">)

show users;

  <p>
    登录test用户，并测试是否只读
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #000000;">show collections;

db.createCollection(’b’)

  <p>
    <span style="background-color: #ffff00;"><strong>创建某库的读写用户</strong></span>
  </p>
  
  <p>
    　　创建test1用户，权限为读写
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #000000;">db.createUser(

{ user: "test1", pwd: "test1", roles: [ { role: "readWrite", db: "test" } ] } )

  <p>
    &nbsp;&nbsp; 查看并测试用户
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #000000;">show users;

db.auth("test1","test1")

  <p>
    <span style="background-color: #ffff00;"><strong>创建对多库不同权限的用户</strong></span>
  </p>
  
  <p>
    &nbsp;&nbsp; 创建对app为读写权限，对test库为只读权限的用户
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #0000ff;">use</span><span style="color: #000000;"> app

db.createUser( { user: "app", pwd: "app", roles: [ { role: "readWrite", db: "app" }, { role: "read", db: "test" } ] } )

  <p>
    查看并测试用户
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #000000;">show users

db.auth("app","app")

  <p>
    <strong>删除用户</strong>
  </p>
  
  <p>
    &nbsp;&nbsp; 删除app用户：先登录到admin数据库
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre>mongo -uroot &ndash;proot <span style="color: #800080;">127.0</span>.<span style="color: #800080;">0.1</span>/admin</pre>
    </div>
  </div>
  
  <p>
    &nbsp;&nbsp; 进入app库删除app用户
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #0000ff;">use</span><span style="color: #000000;"> app

db.dropUser("app")

  <h3>
    <span id="164">1.6.4 自定义数据库</span>
  </h3>
  
  <p>
    创建app数据库的管理员：先登录到admin数据库
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #0000ff;">use</span><span style="color: #000000;"> app

db.createUser( { user: "admin", pwd: "admin", roles: [ { role: "dbAdmin", db: "app" } ] } )

  <p>
    创建app数据库读写权限的用户并具有clusterAdmin权限：
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #0000ff;">use</span><span style="color: #000000;"> app

db.createUser( { user: "app04", pwd: "app04", roles: [ { role: "readWrite", db: "app" }, { role: "clusterAdmin", db: "admin" } ] } )

  <h2>
    <span id="17_SQLMongoDB">1.7 SQL与MongoDB语言对比</span>
  </h2>
  
  <p>
    <span style="background-color: #00ff00;">SQL语言与CRUD语言对照</span>&nbsp;
  </p>
  
  <table class="MsoTable15Grid4Accent1" style="width: 100%; border-width: initial; border-style: none; border-color: initial;" border="1" cellspacing="0" cellpadding="0">
    <tr>
      <td style="width: 37.92%; border-top-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-top-color: #4f81bd; border-bottom-color: #4f81bd; border-left-color: #4f81bd; border-right: none; background: #4f81bd; padding: 0cm 5.4pt;" width="37%">
        <p class="MsoNormal" style="text-align: center; mso-yfti-cnfc: 5;" align="center">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; color: white; mso-themecolor: background1;" lang="EN-US">SQL Schema Statements</span></strong>
        </p>
      </td>
      
      <td style="width: 62.08%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #4f81bd; border-right-color: #4f81bd; border-bottom-color: #4f81bd; border-left: none; background: #4f81bd; padding: 0cm 5.4pt;" width="62%">
        <p class="MsoNormal" style="text-align: center; mso-yfti-cnfc: 1;" align="center">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; color: white; mso-themecolor: background1;" lang="EN-US">MongoDB Schema Statements</span></strong>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 37.92%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" width="37%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">CREATE TABLE users (</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">id MEDIUMINT NOT NULL</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">AUTO_INCREMENT,</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">user_id Varchar(30),</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">age Number,</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">status char(1),</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">PRIMARY KEY (id)</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span></strong>
        </p>
      </td>
      
      <td style="width: 62.08%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" width="62%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">Implicitly created on first insert() operation. The primary </span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">key _idis automatically added if _id field is not specified.</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.insert( {</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">user_id: "abc123",</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">age: 55,</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">status: "A"</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">} )</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">However, you can also explicitly create a collection:</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.createCollection("users")</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 37.92%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt;" width="37%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">ALTER TABLE users</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">ADD join_date DATETIME</span></strong>
        </p>
      </td>
      
      <td style="width: 62.08%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" width="62%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;">在<span lang="EN-US">Collection </span></span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">级</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; mso-bidi-font-family: 'Yu Gothic UI Semibold';">没有数据</span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">结</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; mso-bidi-font-family: 'Yu Gothic UI Semibold';">构概念。然而在</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US"> document</span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">级</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; mso-bidi-font-family: 'Yu Gothic UI Semibold';">，可以通</span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">过</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">$set</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;">在</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">update</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;">操作添加列到文档中。</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.update(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ $set: { join_date: new Date() } },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ multi: true }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 37.92%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" width="37%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">ALTER TABLE users</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">DROP COLUMN join_date</span></strong>
        </p>
      </td>
      
      <td style="width: 62.08%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" width="62%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;">在<span lang="EN-US">Collection </span></span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">级</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; mso-bidi-font-family: 'Yu Gothic UI Semibold';">没有数据</span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">结</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; mso-bidi-font-family: 'Yu Gothic UI Semibold';">构概念。然而在</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US"> document</span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">级</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; mso-bidi-font-family: 'Yu Gothic UI Semibold';">，可以通</span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">过</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">$unset</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;">在<span lang="EN-US">update</span>操作从文档中</span><span style="font-family: '微软雅黑',sans-serif; mso-bidi-font-family: 微软雅黑;">删</span><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; mso-bidi-font-family: 'Yu Gothic UI Semibold';">除列。</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.update(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ $unset: { join_date: "" } },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ multi: true }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 37.92%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt;" width="37%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">CREATE INDEX idx_user_id_asc</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">ON users(user_id)</span></strong>
        </p>
      </td>
      
      <td style="width: 62.08%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" width="62%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.createIndex( { user_id: 1 } )</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 37.92%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" width="37%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">CREATE INDEX</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">idx_user_id_asc_age_desc</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">ON users(user_id, age DESC)</span></strong>
        </p>
      </td>
      
      <td style="width: 62.08%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" width="62%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.createIndex( { user_id: 1, age: -1 } )</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 37.92%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt;" width="37%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">DROP TABLE users</span></strong>
        </p>
      </td>
      
      <td style="width: 62.08%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" width="62%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.drop()</span>
        </p>
      </td>
    </tr>
  </table>
  
  <p>
    <span style="background-color: #00ff00;">插入/删除/更新 语句对比</span>
  </p>
  
  <table class="MsoTable15Grid4Accent1" style="width: 100%; border-width: initial; border-style: none; border-color: initial;" border="1" cellspacing="0" cellpadding="0">
    <tr>
      <td style="width: 39.26%; border-top-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-top-color: #4f81bd; border-bottom-color: #4f81bd; border-left-color: #4f81bd; border-right: none; background: #4f81bd; padding: 0cm 5.4pt;" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 5;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; color: white; mso-themecolor: background1;" lang="EN-US">SQL &nbsp;Statements</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #4f81bd; border-right-color: #4f81bd; border-bottom-color: #4f81bd; border-left: none; background: #4f81bd; padding: 0cm 5.4pt;" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 1;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; color: white; mso-themecolor: background1;" lang="EN-US">MongoDB &nbsp;Statements</span></strong>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">INSERT INTO</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">users(user_id,</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">age</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">status)</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">VALUES ("bcd001",</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">45,</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">"A")</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.insert(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ user_id: "bcd001", age:</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">45, status: "A" }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt;" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">DELETE FROM users</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">WHERE status = "D"</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.remove( { status: "D" } )</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">DELETE FROM users</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.remove({})</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt;" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">UPDATE users</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">SET status = "C"</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">WHERE age > 25</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.update(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ age: { $gt: 25 } },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ $set: { status: "C" } },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ multi: true }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">UPDATE users</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">SET age = age + 3</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">WHERE status = "A"</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.update(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ status: "A" } ,</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ $inc: { age: 3 } },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ multi: true }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
  </table>
  
  <p>
    <span style="background-color: #00ff00;">查询类操作对比&nbsp;</span>
  </p>
  
  <table class="MsoTable15Grid4Accent1" style="width: 100%; border-width: initial; border-style: none; border-color: initial;" border="1" cellspacing="0" cellpadding="0">
    <tr>
      <td style="width: 39.26%; border-top-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-top-color: #4f81bd; border-bottom-color: #4f81bd; border-left-color: #4f81bd; border-right: none; background: #4f81bd; padding: 0cm 5.4pt;" valign="top" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 5;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; color: white; mso-themecolor: background1;" lang="EN-US">SQL SELECT Statements</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top-width: 1pt; border-right-width: 1pt; border-bottom-width: 1pt; border-top-color: #4f81bd; border-right-color: #4f81bd; border-bottom-color: #4f81bd; border-left: none; background: #4f81bd; padding: 0cm 5.4pt;" valign="top" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 1;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif; color: white; mso-themecolor: background1;" lang="EN-US">MongoDB find() Statements</span></strong>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">SELECT *</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">FROM users</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.find()</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt;" valign="top" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">SELECT id,</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">user_id,</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">status</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">FROM users</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" valign="top" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.find(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ user_id: 1, status: 1, _id: 0 }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">SELECT user_id, status</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">FROM users</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.find(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ user_id: 1, status: 1 }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; padding: 0cm 5.4pt;" valign="top" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">SELECT *</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">FROM users</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 4;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">WHERE status = "A"</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; padding: 0cm 5.4pt;" valign="top" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.find(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ status: "A" }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
    
    <tr>
      <td style="width: 39.26%; border-right-width: 1pt; border-bottom-width: 1pt; border-left-width: 1pt; border-right-color: #95b3d7; border-bottom-color: #95b3d7; border-left-color: #95b3d7; border-top: none; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="39%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">SELECT user_id, status</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">FROM users</span></strong>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 68;">
          <strong><span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">WHERE status = "A"</span></strong>
        </p>
      </td>
      
      <td style="width: 60.74%; border-top: none; border-left: none; border-bottom-width: 1pt; border-bottom-color: #95b3d7; border-right-width: 1pt; border-right-color: #95b3d7; background: #dbe5f1; padding: 0cm 5.4pt;" valign="top" width="60%">
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">db.users.find(</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ status: "A" },</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">{ user_id: 1, status: 1, _id: 0 }</span>
        </p>
        
        <p class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph; mso-yfti-cnfc: 64;">
          <span style="font-family: 'Yu Gothic UI Semibold',sans-serif;" lang="EN-US">)</span>
        </p>
      </td>
    </tr>
  </table>
  
  <h2>
    <span id="18">1.8 错误解决</span>
  </h2>
  
  <h6>
    <span id="i"><span style="font-size: 14px;">　　在登陆数据库的时候，发现会由描述文件相关的报错。</span></span>
  </h6>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #000000;">[mongod@MongoDB mongodb]$ mongo

MongoDB shell version: 3.2.8 connecting to: test Server has startup warnings: 2018-01-03T11:08:55.526+0800 I CONTROL [initandlisten] 2018-01-03T11:08:55.526+0800 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 19193 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files.

  <p>
    解决办法：
  </p>
  
  <div>
    <div class="cnblogs_code">
      <pre><span style="color: #0000ff;">cat</span> >> /etc/security/limits.conf &lt;&lt;<span style="color: #000000;">EOF

mongod soft nofile 32767.5 mongod soft nproc 32767.5 EOF

  <p>
    &nbsp;&nbsp; 修改后，重启服务器，即可解决该问题。
  </p>
  
  <h2>
    <span id="19">1.9 参考文献</span>
  </h2>
  
  <div>
    <blockquote>
      <p class="a3" style="color: #000000;">
        [1]&nbsp;&nbsp;<a href="https://docs.mongodb.com/manual/introduction/">https://docs.mongodb.com/manual/introduction/</a>
      </p>
      
      <p class="a3" style="color: #000000;">
        [2]&nbsp;&nbsp;<a href="/wp-content/themes/clsn-003/inc/go.php?url=http://www.mongoing.com/docs/introduction.html" >http://www.mongoing.com/docs/introduction.html</a>
      </p>
      
      <p class="a3" style="color: #000000;">
        [3]&nbsp;&nbsp;<a href="https://zh.wikipedia.org/">https://zh.wikipedia.org/</a>
      </p>
      
      <p class="a3" style="color: #000000;">
        [4]&nbsp;&nbsp;<a href="https://docs.mongodb.com/manual/core/security-built-in-roles/">https://docs.mongodb.com/manual/core/security-built-in-roles/</a>
      </p>
    </blockquote>
  </div>
  
  <p>
    &nbsp;
  </p>
  
  <div id="toc_container" class="toc_white have_bullets">
    <ul class="toc_list">
      <li>
        <a href="#11">1.1 数据库管理系统</a><ul>
          <li>
            <a href="#111">1.1.1 什么是数据？</a>
          </li>
          <li>
            <a href="#112">1.1.2 什么是数据库管理系统？</a>
          </li>
          <li>
            <a href="#113">1.1.3 常见数据库管理系统？</a>
          </li>
        </ul>
      </li>
      
      <li>
        <a href="#12_NoSQL">1.2 NoSQL是什么？</a><ul>
          <li>
            <a href="#121_NoSQL">1.2.1 NoSQL简介</a>
          </li>
          <li>
            <a href="#122_NoSQL">1.2.2 NoSQL数据库四大家族</a>
          </li>
          <li>
            <a href="#123_NoSQL">1.2.3 NoSQL的优势</a>
          </li>
          <li>
            <a href="#124_NoSQLRDBMSnbsp">1.2.4 NoSQL与RDBMS对比&nbsp;</a>
          </li>
        </ul>
      </li>
      
      <li>
        <a href="#13_MongoDB">1.3 MongoDB简介</a><ul>
          <li>
            <a href="#131_MongoDB">1.3.1 MongoDB是什么</a>
          </li>
          <li>
            <a href="#132_MongoDB">1.3.2 MongoDB的特性</a>
          </li>
          <li>
            <a href="#133_mongodb">1.3.3 关系型数据库与mongodb对比</a>
          </li>
          <li>
            <a href="#134_MongoDB">1.3.4 MongoDB数据存储格式</a>
          </li>
          <li>
            <a href="#135_MongoDB">1.3.5 MongoDB的优势</a>
          </li>
          <li>
            <a href="#136">1.3.6 高可用的复制集群</a>
          </li>
          <li>
            <a href="#137">1.3.7 水平扩展</a>
          </li>
          <li>
            <a href="#138">1.3.8 各存储引擎的对比</a>
          </li>
          <li>
            <a href="#139">1.3.9 数据库功能和性能对比</a>
          </li>
          <li>
            <a href="#1310_MongoDB">1.3.10 MongoDB适用场景</a>
          </li>
          <li>
            <a href="#1311_MongoDB">1.3.11 MongoDB 慎用场景</a>
          </li>
          <li>
            <a href="#1312_MongDBnbsp">1.3.12 什么时候该MongDB&nbsp;</a>
          </li>
        </ul>
      </li>
      
      <li>
        <a href="#14_MongoDB">1.4 MongoDB的部署</a><ul>
          <li>
            <a href="#141">1.4.1 安装前准备</a>
          </li>
          <li>
            <a href="#142">1.4.2 环境说明</a>
          </li>
          <li>
            <a href="#143_MongoDB">1.4.3 部署MongoDB</a>
          </li>
          <li>
            <a href="#144_MongoDB">1.4.4 管理MongoDB</a>
          </li>
        </ul>
      </li>
      
      <li>
        <a href="#15_MongoDB">1.5 MongoDB的基本操作</a><ul>
          <li>
            <a href="#151">1.5.1 查询操作</a>
          </li>
          <li>
            <a href="#152">1.5.2 数据管理</a>
          </li>
        </ul>
      </li>
      
      <li>
        <a href="#16_MongoDB">1.6 MongoDB中用户管理</a><ul>
          <li>
            <a href="#161">1.6.1 用户的权限</a>
          </li>
          <li>
            <a href="#162">1.6.2 创建管理员用户</a>
          </li>
          <li>
            <a href="#163">1.6.3 按生产需求创建应用用户</a>
          </li>
          <li>
            <a href="#164">1.6.4 自定义数据库</a>
          </li>
        </ul>
      </li>
      
      <li>
        <a href="#17_SQLMongoDB">1.7 SQL与MongoDB语言对比</a>
      </li>
      <li>
        <a href="#18">1.8 错误解决</a><ul>
          <li>
            <ul>
              <li>
                <ul>
                  <li>
                    <ul>
                      <li>
                        <a href="#i">　　在登陆数据库的时候，发现会由描述文件相关的报错。</a>
                      </li>
                    </ul>
                  </li>
                </ul>
              </li>
            </ul>
          </li>
        </ul>
      </li>
      
      <li>
        <a href="#19">1.9 参考文献</a>
      </li>
    </ul>
  </div>