Q21: What is the MongoDB Aggregation Framework and how does it work?
The Aggregation Framework is a data processing pipeline model. Documents enter a multi-stage pipeline that transforms, filters, groups, sorts, and reshapes them into aggregated results. Each stage passes its calculated output directly to the next stage.
Key Takeaways
- Multi-stage transformation pipeline.
- Executes native database analytics bypassing application memory processing.
Knowledge Check
How do aggregation stages pass data forward down the pipeline?