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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@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 - 10:05:30 CST












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