# Group

Back to: [Index of transforms](../cards-transform-table-index/index.md)

Transforms in this section aggregate a collection of values over some pre-defined window or bucket.
Learn more about [how to search for and add a transformation](../cards-transform-table/index.md#add-a-transformation).

* [Group by](../card-group-by/index.md)
* [Joined group by](../card-joined-group-by/index.md)