Laszlo Tibor schrieb:
>
> On Wednesday, March 13, 2002 11:53 AM Behalf Of Andre Schubert wrote:
>
> > Hi to all,
> >
> > i have a simple problem and wont request assistance fro m this list.
> > i have to tables
> >
> > foo:
> > id int8 UNIQUE
> >
> > bar:
> > id int8 UNIQUE
> > foo_id int8
> >
> > Now i wont foo_id to be a id which exists in the foo, this could be done
> > with foo_id REFERENCES foo (id).
> > But what should i do if i want foo_id to be a id existing in foo or to
> > be zero(0).
> > I have created a view as "select id from foo UNION select 0" and tried
> > to REFERENCE against this view, but that
> > doesnt work.
> > Can this problem be solved by a somebody ????
> >
> > Thanks
>
> Why do you want to use zeros? A foreign key could be NULL.
Yes I know, but i need these Zeroes.....
Thanks
>
> Regards, Tibor
> ltibor@mail.tiszanet.hu
>
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