Introduction
Unlock your data with MongoDB aggregations
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Application and data model
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1. MongoDB Aggregation Framework
Overview of the MongoDB aggregation framework
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Aggregation pipeline stages
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Aggregation vs. standard queries
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Aggregation pipeline vs. map-reduce
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2. Working with the Aggregation Pipeline
$match, $sort, $limit
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Transforming data with aggregations
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Adding and removing data with aggregations
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3. Aggregation Pipeline Stages
Persisting aggregation results with $out
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Joins in MongoDB with $lookup
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Working with arrays and $unwind
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4. Advanced Aggregations
Custom aggregation functions
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Custom aggregation accumulator
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Performance and optimization of the aggregation pipeline
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