Re: NULL

From: Anne & Lynn Wheeler <lynn_at_garlic.com>
Date: Mon, 04 Oct 2004 06:57:05 -0600
Message-ID: <u8yamzlni.fsf@mail.comcast.net>

"Marshall Spight" <mspight_at_dnai.com> writes:
> In contrast, SQL's NULL pollutes everything it touches, by its
> nature, and sometimes even when it doesn't have to, because it's so
> confusing. Once something UNKNOWN is introduced into an equation,
> it's likely that every subsequent calculation based on it will also
> be unknown.

posting on NULLS & 3-value logic
http://www.garlic.com/~lynn/2003g.html#40 How to cope with missing values - NULLS? http://www.garlic.com/~lynn/2003g.html#41 How to cope with missing values - NULLS?

references Date article from 1992.

-- 
Anne & Lynn Wheeler | http://www.garlic.com/~lynn/

Received on Mon Oct 04 2004 - 07:57:05 CDT