> For the complete documentation index, see [llms.txt](https://docs.kuwala.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kuwala.io/transformation-catalog/general/group-by-columns.md).

# Group by columns

### Description

With this transformation, you can group rows together based on a set of columns and aggregate the values of other columns.

### Parameters

* group\_by\_columns
* aggregated\_columns
  * Options: count, max, min, sum, avg

{% hint style="info" %}
Syntax for `aggregated_columns` is `COLUMN_NAME` + "KUWALA\_AGG" + `COLUMN_AGG`.
{% endhint %}