# ImportDefinitionColumnBasedActionType

The row-level outcomes for a column-based import. Use this data type for `ControlColumnActions.Action` and `ControlColumnDefaultAction` when `UpdateType` is `ColumnBased`.

## Values

| Name                | Description                                                                                                                                                                                           |
| ------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `AddAndUpdate`      | Indicates that the import adds new subscribers and updates existing subscribers. It corresponds to the **Add and Update** option.                                                                     |
| `AddButDoNotUpdate` | Indicates that the import adds new subscribers but doesn’t update existing subscribers. It corresponds to the **Add Only** option.                                                                    |
| `Delete`            | Indicates that the import deletes matching subscribers.                                                                                                                                               |
| `Skip`              | Indicates that the import takes no action on the matching row.                                                                                                                                        |
| `UpdateButDoNotAdd` | Indicates that the import updates existing subscribers but doesn’t add subscribers. This property applies to both subscriber lists and data extensions. It corresponds to the **Update Only** option. |

## Related Items

- [ImportDefinition](/docs/marketing/marketing-cloud/guide/importdefinition.md)
- [ImportDefinitionColumnBasedAction](/docs/marketing/marketing-cloud/guide/importdefinitioncolumnbasedaction.md)