Aggregation Commands
MongoDB 5.0 is end of life as of October 2024. This version of the documentation is no longer
supported. To upgrade your 5.0 deployment, see the MongoDB 6.0 upgrade procedures.
Note
For details on a specific command, including syntax and examples, click on the link to the command's reference page.
Name | Description |
|---|---|
Performs aggregation tasks such as | |
Counts the number of documents in a collection or a view. | |
Displays the distinct values found for a specified key in a collection or a view. | |
Performs map-reduce aggregation for large data sets. |
For a detailed comparison of the different approaches, see Aggregation Commands Comparison.