Re: Does Codd's view of a relational database differ from that of Date & Darwin? [M.Gittens]
From: mountain man <hobbit_at_southern_seaweed.com.op>
Date: Sat, 04 Jun 2005 00:45:51 GMT
Message-ID: <3R6oe.1962$F7.1337_at_news-server.bigpond.net.au>
Date: Sat, 04 Jun 2005 00:45:51 GMT
Message-ID: <3R6oe.1962$F7.1337_at_news-server.bigpond.net.au>
"-CELKO-" <jcelko212_at_earthlink.net> wrote in message
news:1117636456.185385.128930_at_g44g2000cwa.googlegroups.com...
> You forgot about NULLs -- Date wants none, Codd had two kinds in RM II
> and SQL has one.
There have been, there are,
and there always will be
NULLS in the real world.
Does this fact not conflict
with Date's wants, and if
so, why does Date want
to ignore them?
-- Pete Brown IT Managers & Engineers Falls Creek Australia www.mountainman.com.au/softwareReceived on Sat Jun 04 2005 - 02:45:51 CEST