# Column

- [JSON representation](https://developers.google.com/ads-data-hub/marketers/reference/rest/v1/Column#SCHEMA_REPRESENTATION)

Defines a Table column.

| JSON representation |
|---|
| ``` { "columnId": string, "columnType": { object (`https://developers.google.com/ads-data-hub/marketers/reference/rest/v1/FieldType`) } } ``` |

| Fields ||
|---|---|
| `columnId` | `string` Column identifier. |
| `columnType` | ``object (`https://developers.google.com/ads-data-hub/marketers/reference/rest/v1/FieldType`)`` Column type. |