Re: 3vl 2vl and NULL

From: Anne & Lynn Wheeler <lynn_at_garlic.com>
Date: Thu, 08 Dec 2005 10:45:48 -0700
Message-ID: <m3irtz32k3.fsf_at_lhwlinux.garlic.com>


"David Cressey" <david.cressey_at_earthlink.net> writes:
> I've stayed away from the 3vl versus 2vl discussion over in the
> monster NULL thread. Mainly, I'm not sure exactly what Codd and
> Date have to say on the subject. I think that both of them are
> smarter than I am, and that they don't agree on the subject, and
> that they agree that they disagree. That pretty much leaves it up
> to us, doesn't it?

posts early in the null thread
http://www.garlic.com/~lynn/2005t.html#20 So what's null then if it's not nothing? http://www.garlic.com/~lynn/2005t.html#23 So what's null then if it's not nothing?

referring to a post in an earlier thread on same subject http://www.garlic.com/~lynn/2003g.html#40 How to cope with missing values - NULLS?

quoting a Date artcle from 1992:
An Explanation of why three-valued logic is a mistake (Why Accept Wrong Answers?)

-- 
Anne & Lynn Wheeler | http://www.garlic.com/~lynn/
Received on Thu Dec 08 2005 - 18:45:48 CET

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