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New posts in aggregation-framework

Aggregating in local timezone in mongodb

Removing duplicates in mongodb with aggregate query

Conditionally Include Aggregation Pipeline Stages

How to convert ObjectID to String in $lookup (aggregation)

Sorting and ranking documents based on key values?

mongodb multiple aggregations in single operation

Mongodb recursive query

Mongodb Aggregation : How to return only matching elements of an array [duplicate]

using $regex in mongodb aggregation framework in $group

Moving averages with MongoDB's aggregation framework?

Return specific field in aggregate

The difference between $ and $$ in MongoDB

pymongo: remove duplicates (map reduce?)

Mongoose group and count

mongoDB: how to reverse $unwind

Selecting Distinct values from Array in MongoDB

mongoose sum a value across all documents

Fill missing dates in records

Aggregate $lookup does not return elements original array order

Aggregate pipeline throws the error "A pipeline stage specification object must contain exactly one field."