# Grouping fields

![Modify values from group rows step window](/files/rNRyQgAcyuQ3TYBYwEgd)

| Field             | Description                                                            |
| ----------------- | ---------------------------------------------------------------------- |
| **Field name**    | Specifies the field name that will be used to group the incoming data. |
| **Pass Through?** | Select to add the specified incoming field to the output fields.       |

In the \*\*Target hierarchical\*\* field, you can specify a new field name to be added into output or select an incoming hierarchical field name to modify.

**Note:** If the target field is an existing field, it must be included as one of the grouping fields.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.pentaho.com/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/modify-values-from-grouped-rows/grouping-fields-modify-values-from-grouped-rows.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
