Re: What does this NULL mean?

From: Alfredo Novoa <alfredo_novoa_at_hotmail.com>
Date: 16 Dec 2005 05:17:03 -0800
Message-ID: <1134739023.340570.59810_at_o13g2000cwo.googlegroups.com>


On Fri, 16 Dec 2005 09:05:52 GMT, "David Cressey" <dcressey_at_verizon.net> wrote:

>First, I find it extremely odd that RM would be taught as revealed truth.

It is not revealed truth, it is a little branch of mathematics. Something that anybody with the appropriate skills might check.

>But that's still not the heart of the matter. The heart of the matter is
>this: "model propositions for data processing".
>and the key word here is "processing".

A rather unfortunate word.

>I think that Codd and Date wrote about the use of the RM (or, more
>precisely, the RDM) in the context of data storing and data sharing, and
>not in the context of data processing. It's not clear to me that you want
>to model data the same way for processing that you want to model data for
>storing and sharing.

A discouraging paragraph :-(

They write about data management.

Regards Received on Fri Dec 16 2005 - 14:17:03 CET

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