---
title: "ChildColumns Element"
---

The ChildColumns element contains information about columns that make a child side of the relation between two tables in the report data set.

| Name | Cardinality | Has Children | Description |
| :- | :- | :- | :- |
| `TableName` | 1 | No | Child table name. Must match a table name set in a [TableName](/words/sharepoint/tablenames-element/) element for a query. |
| `ColumnNames` | 1 | Yes | Lists the names of the columns that form the child side of the relation. |