January 2021
Intermediate to advanced
505 pages
9h 45m
Chinese
Content preview from PHP编程：第4版
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238
｜
第
9
章
数据库
MongoDB
我们要介绍的最后一种数据库类型是被称为
NoSQL
类型的数据库。
NoSQL
数据库人气
正旺，因为它们在系统资源上非常轻量，更重要的是，它们对外以典型的
SQL
命令结构
工作。正因为上面这两个原因，
NoSQL
数据库在平板电脑、智能手机等移动设备上越来
越流行。
NoSQL
数据库世界中的领跑者之一就是
MongoDB
，它是本章最后一节的焦点。在这里
我们将只触及
MongoDB
产品的表面，只是让你知道使用它能带来什么。本话题的更多
详细介绍，请参考
Steve Francia
编写的
MongoDB and PHP
一书（由
O
’
Reilly
出版）。
关于
MongoDB
你应该知道的第一件事是，它不是传统的数据库，它有自己的安装配置
和术语。对于传统数据库用户，适应它的工作方式会花费一些时间。表
9-3
给出了它和
标准
SQL
术语的对比。
表9-3：MongoDB与SQL的对比
传统
SQL
术语
MongoDB
术语
数据库（
Database
） 数据库（
Database
）
数据表（
Table
） 集合（
Collection
）
数据行（
Row
） 文件。不相关，不像数据库的数据行（
Row
）。相反，被认为是
数组
很难在
MongoDB
范式中找到数据库行的等价物。据说其中一个最好的方法是，认为集
合中的数据像多维数组，很快会在我们的
library
数据库改进示例中发现这一点。
如果你只想在本地主机上尝试使用
MongoDB
（推荐，用来熟悉它），可以使用一体化的
工具，如
Zend Server CE
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