Aggregation Commands
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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 $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.