Re: What does this NULL mean?
Date: 14 Dec 2005 07:27:51 -0800
Message-ID: <1134574071.843808.11170_at_g14g2000cwa.googlegroups.com>
"mountain man" <hobbit_at_southern_seaweed.com.op> wrote
>Theorists like Date who think the null should be rationalised
>out of existence have no demonstrated understanding of the
>database change management environment,
> and specifically
>the management of schema evolution and its consequences
>in regard to the generation of nulls.
They are completely independent issues. Nulls are a mistake and schema maintenance is something elemental and straighforward.
>Change management or schema evolution is not adequately
>addressed by Date et al,
It is sufficiently addressed, but it is so trivial that there is little to say about it.
> however by the time they set forth
>the processes covered under this subject, it will become very
>apparent that the NULL will never be rationalised away, and
>it is better to therefore appropriately manage its identification,
>its existence and its resolution interactively.
Plain nonsenses.
Regards
Alfredo
Received on Wed Dec 14 2005 - 16:27:51 CET