Re: foundations of relational theory?
From: Mikito Harakiri <mikharakiri_at_iahu.com>
Date: Fri, 31 Oct 2003 08:05:30 -0800
Message-ID: <BUvob.16$T3.164_at_news.oracle.com>
Date: Fri, 31 Oct 2003 08:05:30 -0800
Message-ID: <BUvob.16$T3.164_at_news.oracle.com>
"Andrew McAuley" <amcauley_notreally_at_sprezzatura.com> wrote in message
news:bnt3kh$jqd$1_at_sparta.btinternet.com...
> Why would you EVER " have a constraint that an attribute in one relation
> equals a sum of values from another relation."? To do so would be to store
> redundant information. I would never dream of doing this as it requires
two
> updates for every update.
Change equality to inequality. Received on Fri Oct 31 2003 - 17:05:30 CET