Mastering the MongoDB Aggregation Pipeline

The aggregation pipeline is one of MongoDB's most powerful features. It allows you to perform complex data processing directly in the database. ### Stage Optimization Order your stages carefully to minimize the amount of data being processed. Filter your results early with $match and $project. ### Facets for Analytics The $facet stage allows you to perform multiple aggregations on the same set of input documents in a single stage, which is perfect for building analytics dashboards.