Bob,
I'll check that out. I didn't realize you could impose a uniqueness constraint if nulls were allowed. Sounds like just what I need. Thanks.
>
>How about making the column accept nulls and put a unique constraint on it. This will get you what you want without writing any code. (Except the code to handle the error.
>
Previous
Reply
View the map of this thread
View the map of this thread starting from this message only
View all messages of this thread
View all messages of this thread starting from this message only