Not All Constraints

Writer: If you have rows with knols, and you want to eventually add a not in oll constraint, but you need to get rid of those rows with knolls first. So i'm wondering if you coud add that constraint with validate falts on it, so that the constraint would apply to new rows. Writer: It's a good suggestion, based on this whole conversation we've been having. But i don't think it's the thing i'm mont to check, though,. because i might get in trouble if i at et wrong.