On Nov 15, 2007 7:32 PM, Albe Laurenz <laurenz.albe@wien.gv.at> wrote:
>
> You want to have a "conditional" foreign key reference that checks
> against different tables depending on a "type" field, right?
>
> For complicated conditions like this, you could use a
> BEFORE INSERT trigger that throws an error when the condition
> is violated.
That we do. My query is to put a check on select queries to avoid
programmers not using all the necessary conditions.
Thanks and regards,
Ma Sivakumar
--
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எல்லோரும் எல்லாமும் பெற வேண்டும்
http://masivakumar.blogspot.com