> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/memory-group-by/general/the-fields-that-make-up-the-group-table.md).

# The fields that make up the Group Table

Use this table to specify the fields you want to group. Click **Get Fields** to add all fields from the PDI input stream. Right-click a row in the table to edit that single row or all rows in the table.

**Note:** Leave this table blank to calculate aggregate functions over the entire dataset.


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