Re: So what's null then if it's not nothing?
From: mAsterdam <mAsterdam_at_vrijdag.org>
Date: Thu, 17 Nov 2005 21:58:29 +0100
Message-ID: <437cee72$0$11068$e4fe514c_at_news.xs4all.nl>
> Because sometimes we have a slot for that and we must write some value
> into it.
Date: Thu, 17 Nov 2005 21:58:29 +0100
Message-ID: <437cee72$0$11068$e4fe514c_at_news.xs4all.nl>
Alexandr Savinov wrote:
> JOG schrieb:
>
>> Alexandr Savinov wrote: >>
> Because sometimes we have a slot for that and we must write some value
> into it.
This is the practical answer to the question in the subjectline.
> ...Because there are two parts of data modeling:
>
> - entity modeling, and
> - identitiy mdoeling
>
> They are completely different although exist together. When we are
> talking about existence then it is about identity modeling. When we are
> talking about properties (solour, size etc.) then it is all about entity
> modeling.
And IMHO this points in the right direction to proceed.
> ...
Received on Thu Nov 17 2005 - 21:58:29 CET