Operators运算符¶

Query and Projection Operators查询和投影运算符

Query operators provide ways to locate data within the database and projection operators modify how data is presented.查询操作符提供在数据库中定位数据的方法，投影操作符修改数据的显示方式。

Update Operators更新运算符

Update operators are operators that enable you to modify the data in your database or add additional data.更新运算符是使您能够修改数据库中的数据或添加其他数据的运算符。

Aggregation Pipeline Stages聚合管道阶段

Available aggregation stages for Aggregation Pipeline.聚合管道的可用聚合阶段。

Aggregation Pipeline Operators聚合管道操作符

Aggregation pipeline operations have a collection of operators available to define and manipulate documents in pipeline stages.聚合管道操作有一组运算符，可用于定义和操作管道阶段中的文档。

Query Modifiers查询修饰符

Query modifiers determine the way that queries will be executed.查询修饰符确定执行查询的方式。