Re: ?? Functional Dependency Question ??
From: paul c <toledobythesea_at_oohay.ac>
Date: Sun, 19 Oct 2008 13:25:05 GMT
Message-ID: <RyGKk.2426$fF3.1072_at_edtnps83>
Date: Sun, 19 Oct 2008 13:25:05 GMT
Message-ID: <RyGKk.2426$fF3.1072_at_edtnps83>
tlbaxter99_at_yahoo.com wrote:
> Does anyone think there is a possibility that X intersect Y is not
> empty? Could this be what the authors intended?
I thought the Armstrong Axioms apply to any subset of a header. You could substitute RS for X and ST for Y and show that RST -> AB. Received on Sun Oct 19 2008 - 15:25:05 CEST