Aggregation Commands
Note
For details on specific commands, including syntax and examples, click on the specific command to go to its reference page.
Name | Description |
---|---|
Performs aggregation tasks such as $group using an aggregation pipeline. | |
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.