Re: super type & sub type, interested too

On Wed, 06 Nov 2002 22:13:03 +0100, "Lennart Jonsson" <lelle2_at_bonetmail.com> wrote:

>Oh, another thing I have been thinking about regarding this. Has any one
>thought of ways/strategies to prevent someone from just adding a
>supertype, and not a subtype. I cant seem to come up with a clever way of
>doing this. Anyone else?

Use a dbms that supports deferred constraints.

-- 
Mike Sherrill
Information Management Systems