Aggregation Reference

• Aggregation Pipeline Quick Reference
• Quick reference card for aggregation pipeline.
• Aggregation Commands
• The reference for the data aggregation commands, which provide theinterfaces to MongoDB’s aggregation capability.
• Aggregation Commands Comparison
• A comparison of mapReduce and aggregatecommands.
• Aggregation Pipeline Operators
• Aggregation pipeline operations have a collection of operatorsavailable 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 usingthe aggregation pipeline and operators in MongoDB and common SQLstatements.