Re: Basic question?What 's the key if there 's no FD(Functional Dependencies)?
From: paul c <toledobythesea_at_dbms.yuc>
Date: Fri, 03 Nov 2006 14:54:56 GMT
Message-ID: <4LI2h.251675$R63.146997_at_pd7urf1no>
Date: Fri, 03 Nov 2006 14:54:56 GMT
Message-ID: <4LI2h.251675$R63.146997_at_pd7urf1no>
paul c wrote:
...
> Never had a Civic but all my Honda two-wheelers had unique serial
> numbers. None of them had all the same attributes but if they had, I
> would have made up my own serial numbers. I believe Codd called this
> the information principle. Without it, some applications are
> impossible, such as the one you are making up. I believe this is called
> a straw man.
I think a corollary of the IP might be "you can't apply information you don't have".
p Received on Fri Nov 03 2006 - 15:54:56 CET