Re: constraints in algebra instead of calculus
From: Jon Heggland <jon.heggland_at_idi.ntnu.no>
Date: Tue, 19 Jun 2007 10:10:32 +0200
Message-ID: <f5831n$bii$1_at_orkan.itea.ntnu.no>
Date: Tue, 19 Jun 2007 10:10:32 +0200
Message-ID: <f5831n$bii$1_at_orkan.itea.ntnu.no>
David Cressey wrote:
> I can't see much use for grouping on all attributes. It seems to me that
> this has to be a null operation.
Why?
-- JonReceived on Tue Jun 19 2007 - 10:10:32 CEST