Re: Idempotence and "Replication Insensitivity" are equivalent ?
From: Chris Smith <cdsmith_at_twu.net>
Date: Sat, 23 Sep 2006 07:35:13 -0600
Message-ID: <MPG.1f7ee5f727a97a0989730_at_news.altopia.net>
Date: Sat, 23 Sep 2006 07:35:13 -0600
Message-ID: <MPG.1f7ee5f727a97a0989730_at_news.altopia.net>
David Cressey <dcressey_at_verizon.net> wrote:
> It's probably me. I'm trying to use the term "domain" the way some of the
> mathematicians seem to be using it.
>
> Here's what I think I got by making inferences from other posts: the domain
> of a relation is the cartesian product of the domains of each of its
> attributes.
That's correct. Database theory authors just don't often use the word "domain" in that way.
-- Chris SmithReceived on Sat Sep 23 2006 - 15:35:13 CEST