MongoDB Aggregation Framework Principles and Examples

The MongoDB aggregation framework is a powerful capability built into MongoDB document database system that enables developers to accomplish filtering, reshaping, grouping, sorting, aggregating, and more. This book covers the main pipeline operators, and gives various examples and tips on their use. Also included is an effective technique that can be used to generate JSON documents from relational database queries. The 2nd edition includes many changes that detail aggregation framework changes since MongoDB 2.6