Re: A simple notation, again
From: paul c <toledobythesea_at_oohay.ac>
Date: Tue, 17 Jul 2007 13:57:52 GMT
Message-ID: <AV3ni.126732$NV3.62634_at_pd7urf2no>
>
> You imply order (adjacency) when relation attributes should not be
> subjected to any....
>
Date: Tue, 17 Jul 2007 13:57:52 GMT
Message-ID: <AV3ni.126732$NV3.62634_at_pd7urf2no>
Cimode wrote:
> On Jul 16, 7:05 pm, "Brian Selzer" <br..._at_selzer-software.com> wrote:
>
>>"David Cressey" <cresse..._at_verizon.net> wrote in message
>>
...
>>
>>How about something like this
>>{(Last, First, Num) :
>>("David", "Cressey", 1),
>>("Marshall", "Spight", 2),
>>("Bob", "Badour", 3),
>>("Jan", "Hidders", 4)}
>
> You imply order (adjacency) when relation attributes should not be
> subjected to any....
>
When Codd wrote of eliminating order dependency, he wasn't talking about language notations or grammars, in fact he used ordering to describe his idea!
p Received on Tue Jul 17 2007 - 15:57:52 CEST