Re: Towards a definition of atomic
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Fri, 01 Feb 2008 16:49:03 -0400
Message-ID: <47a385bf$0$4035$9a566e8b_at_news.aliant.net>
>>The important thing in this discussion is: The relational model treats
>>domain values as neither composable nor decomposable. They are simply
>>values upon which one may evaluate defined operations.
>>
>>Thus, no decompositions of attributes are meaningful from the perspective
>>of the RM.
Date: Fri, 01 Feb 2008 16:49:03 -0400
Message-ID: <47a385bf$0$4035$9a566e8b_at_news.aliant.net>
David Portas wrote:
> "Bob Badour" <bbadour_at_pei.sympatico.ca> wrote in message > news:47a34585$0$4044$9a566e8b_at_news.aliant.net... >
>>The important thing in this discussion is: The relational model treats
>>domain values as neither composable nor decomposable. They are simply
>>values upon which one may evaluate defined operations.
>>
>>Thus, no decompositions of attributes are meaningful from the perspective
>>of the RM.
> > Aren't UNGROUP and UNWRAP decompositions of attributes in Tutorial D? If > not, I don't know what you mean by "decomposition".
They are operations. Received on Fri Feb 01 2008 - 21:49:03 CET