Re: super type & sub type, interested too
From: Mike Sherrill <MSherrill_at_compuserve.com>
Date: Thu, 07 Nov 2002 07:30:40 -0500
Message-ID: <87nksuccj4mk9evhkkspe9gksvkkfjq5ri_at_4ax.com>
Date: Thu, 07 Nov 2002 07:30:40 -0500
Message-ID: <87nksuccj4mk9evhkkspe9gksvkkfjq5ri_at_4ax.com>
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 SystemsReceived on Thu Nov 07 2002 - 13:30:40 CET