Aggregation Reference聚合引用¶

Aggregation Pipeline Quick Reference聚合管道快速参考

Quick reference card for aggregation pipeline.聚合管道的快速参考卡。

Aggregation Commands聚合命令

The reference for the data aggregation commands, which provide the interfaces to MongoDB’s aggregation capability.数据聚合命令的参考，它为MongoDB的聚合功能提供接口。

Aggregation Commands Comparison聚合命令比较

A comparison of mapReduce and aggregate commands.mapReduce和aggregate命令的比较。

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。

Variables in Aggregation Expressions聚合表达式中的变量

Use of variables in aggregation pipeline expressions.在聚合管道表达式中使用变量。

SQL to Aggregation Mapping ChartSQL到聚合映射图

An overview common aggregation operations in SQL and MongoDB using the aggregation pipeline and operators in MongoDB and common SQL statements.概述了SQL和MongoDB中使用聚合管道和MongoDB中的运算符以及常见SQL语句的常见聚合操作。