| CONSTRAINT |
If you leave out CONSTRAINT and constraint name, the system names the constraint for you. | |
| CHECK | pop-up caption | |
| Condition | The condition parameter can be any valid condition that evaluates to TRUE or FALSE. Think of the WHERE clause in a query. The same type of condition that works in a WHERE clause will work in a CHECK constraint. | |
| TYPE_OF_LOG | Add the CHECK constraint to a column specification if the constraint deals only with that column. |