# Relation Column Use the relation column to connect a master table (also called a parent table) to its detail/child tables. A relation column links multiple records from one child table to a single record in the master table. This is called a [**master-detail relationship**](https://docs.powertable.com/explore-powertable/master-detail-tables-parent-child-linked-records). [This section](https://docs.powertable.com/explore-powertable/master-detail-tables-parent-child-linked-records/creating-master-detail-tables) explains in detail the steps to include a relation column that establishes such a relationship between multiple tables. --- # 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.fabricplan.com/powertable-sheets/how-tos/adding-columns-overview/add-visual-column/relation-column.md?ask= ``` 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.