Re: [Q] When to use foreign keys
From: Lun Wing San (Oracle) <"Lun>
Date: 1996/11/06
Message-ID: <328171CD.D0E_at_hkpc.org>#1/1
Date: 1996/11/06
Message-ID: <328171CD.D0E_at_hkpc.org>#1/1
TallGuy wrote:
> For example, I've got a master and detail table. Right now, the
> common data element would be ss#. It must be unique in the master,
> but not unique in the detail table.
>
> A Foreign key kind of makes sense (for ss#), but I can not make it
> work. The unique of the master table wont let me add data to the
> detail table.
Would you mind to specify the ORA error and most importantly, please give the error message?
-- Name : Lun Wing San Title : Senior Consultant of Lun's Oracle Solution Company System Administrator and Oracle DBA of the Quick Response Center Oracle Developer of the Hong Kong Productivity Council Email Addr. : sunny_at_hkpc.org Telephone : 852-2788-5841Received on Wed Nov 06 1996 - 00:00:00 CET