Specifies the rule to follow when a Key is deleted.
| Constant | Value | Description |
| adRICascade | 1 | Cascade changes. |
| adRINone | 0 | Default. No action is taken. |
| adRISetDefault | 3 | Foreign key value is set to the default. |
| adRISetNull | 2 | Foreign key value is set to null. |