Distributed foreign keys (was Re: Category Types)
From: Paul Vernon <paul.vernon_at_ukk.ibmm.comm>
Date: Wed, 18 Jun 2003 17:25:29 +0100
Message-ID: <bcq3u8$201s$1_at_gazette.almaden.ibm.com>
Date: Wed, 18 Jun 2003 17:25:29 +0100
Message-ID: <bcq3u8$201s$1_at_gazette.almaden.ibm.com>
"Alexey Kirich" <kirich_a_at_softline.kiev.ua> wrote in message
news:3ef01f21$1_at_ns...
[snip]
> This approach can be made with hope, that in the future RDBMSs will support
> OR like foreign constraints.
Hugh Darwen has a proposal for such "distributed foreign key" shorthands in this presentation.
http://www.hughdarwen.freeola.com/TheThirdManifesto.web/Missing-info-without-nulls.pdf
Regards
Paul Vernon
Business Intelligence, IBM Global Services
Received on Wed Jun 18 2003 - 18:25:29 CEST