Two relations with the same attributes (was: 3 value logic. Why is SQL so special?)
From: mAsterdam <mAsterdam_at_vrijdag.org>
Date: Sun, 17 Sep 2006 09:06:19 +0200
Message-ID: <450cf3ad$0$4527$e4fe514c_at_news.xs4all.nl>
Date: Sun, 17 Sep 2006 09:06:19 +0200
Message-ID: <450cf3ad$0$4527$e4fe514c_at_news.xs4all.nl>
Cimode wrote:
> If 2 relations have the same attributes then they should be one
> relation.
No. As long as the name of the relation and the meaning of the propositions differ it is ok to have two relations with the same attributes. The meaning of the propositions depends on the external predicate. Received on Sun Sep 17 2006 - 09:06:19 CEST