Aggregation Reference

Aggregation Resources

Aggregation Database Commands and Methods

Reference for data aggregation commands.

Aggregation Stages

Reference for aggregation pipeline stages.

Variables in Aggregation Expressions

Use variables in aggregation pipeline expressions.

MongoDB Query Language Reference

Reference for MQL operators and expressions used in aggregations and other MQL queries.

SQL to Aggregation Mapping Chart

Compare common aggregation operations in SQL and MongoDB.

Aggregation Commands Comparison

Compare mapReduce and aggregate.

Practical MongoDB Aggregations (e-book)

For more information on aggregations, read the Practical MongoDB Aggregations e-book.