Re: Constraints and Functional Dependencies
From: Cimode <cimode_at_hotmail.com>
Date: 25 Feb 2007 02:47:19 -0800
Message-ID: <1172400439.218185.114680_at_m58g2000cwm.googlegroups.com>
Date: 25 Feb 2007 02:47:19 -0800
Message-ID: <1172400439.218185.114680_at_m58g2000cwm.googlegroups.com>
On 25 fév, 02:50, "Marshall" <marshall.spi..._at_gmail.com> wrote:
> On Feb 24, 11:28 am, paul c <toledobythe..._at_oohay.ac> wrote:
[Snipped]
>
> Specifically I defined a particular kind of FD which is equivalent
> to a candidate key. An FD in turn being a particular kind
> of constraint.
>
> Hmmm. Can we express keyness otherwise? I can't think how.
Good intuition. See alternate formal definition proposed.
> Marshall
Received on Sun Feb 25 2007 - 11:47:19 CET