Re: Changing Foreign Key Entry

Su Man wrote:

> One Question :
>
> Don't we have something like ON UPDATE CASCADE ( similar to ON DELETE
> CASCADE) ???
>
> "DA Morgan" <damorgan_at_exxesolutions.com> wrote in message
> news:3E8CA783.DA5EAABF_at_exxesolutions.com...
> > Nicolas Bronke wrote:
> >
> > > In a database there are existing a foreign key. The fieldtype is
> Varchar2.
> > > Now one entry of the foereign key shall be changed, because of a
> misspelling
> > > in the reference table and therefore also in the detail tables.
> > >
> > > I thought I have to disable the foreign key, change the value and enable
> the
> > > foreign key again.
> > >
> > > Now someone told me that there is also another way via a trigger on the
> > > reference table. Is that true?
> > >
> > > Regards
> > > Nicolas
> >
> > Add the correct value to the lookup table
> > update the child table
> > delete the incorrect value.
> >
> > This is not a proper use of a trigger or any other complicated way to
> perform a
> > simple update.
> >
> > Daniel Morgan
> >

You can write your own but that is irrelevant. You are still trying to overly complicate a very simple bit of maintenance.

Daniel Morgan Received on Fri Apr 04 2003 - 10:33:13 CST