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文章 2022-02-16 来自：开发者社区

MongoDB语法与现有关系型数据库SQL语法比较

MongoDB语法                                  MySql语法 db.test.find({'name':'foobar'})<==> select * from test whe...

文章 2022-02-16 来自：开发者社区

对数据库的查询是相当频繁的，而且很多特殊的需求我们都可以通过SQL查询语句构造出来。那么我们平时习惯的SELECT语法实现的各种功能，在MongoDB中是怎么实现的，他们之间是怎么却别的。现在我们就来研究下MongoDB的查询语法和SQL的SELECT语法的不同。 1.查询所有数据SQL:SELECT * FROM UserInfoMongoDB:db.UserInfo.find() 2.查...

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