# Group field table

![Group field table in Row denormaliser](/files/wJdmtc7SU9SQB2Z4Yxrh)

Use **The fields that make up the grouping** table to specify what fields from the incoming PDI data stream define the grouping for the denormalization process. You can click **Get Fields** to automatically fill the table with all the fields from the incoming PDI data stream.

See [Understanding PDI data types and field metadata](/pdia-data-integration/10.2-data-integration/data-integration-perspective-in-the-pdi-client/advanced-topics-pdi-perspective/understanding-pdi-data-types-and-field-metadata.md) to maximize the efficiency of your transformation and job results.


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