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Aggregation Reference
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- Aggregation Pipeline Quick Reference
- Quick reference card for aggregation pipeline.
- Aggregation Commands
- The reference for the data aggregation commands, which provide the interfaces to MongoDB's aggregation capability.
- Aggregation Commands Comparison
- A comparison of
mapReduceandaggregatecommands. - Aggregation Pipeline Operators
- Aggregation pipeline operations have a collection of operators available to define and manipulate documents in pipeline stages.
- Variables in Aggregation Expressions
- Use of variables in aggregation pipeline expressions.
- SQL to Aggregation Mapping Chart
- An overview common aggregation operations in SQL and MongoDB using the aggregation pipeline and operators in MongoDB and common SQL statements.
- Practical MongoDB Aggregations (e-book)
- For more information on aggregations, read the Practical MongoDB Aggregations e-book.