Re: CJ Date on Missing Information
From: Jonathan Leffler <jleffler_at_earthlink.net>
Date: Mon, 20 Mar 2006 05:36:33 GMT
Message-ID: <BbrTf.6658$Bj7.5499_at_newsread2.news.pas.earthlink.net>
>
> old posting that references a dec92 article in database programming
> and design by date on dealing with unknown values titled "An
> Explanation of why three-valued logic is a mistake (Why Accept Wrong
> Answers?)"
> http://www.garlic.com/~lynn/2003q.html#40 How to cope with missing values - NULLS?
> http://www.garlic.com/~lynn/2003q.html#41 How to cope with missing values - NULLS?
Date: Mon, 20 Mar 2006 05:36:33 GMT
Message-ID: <BbrTf.6658$Bj7.5499_at_newsread2.news.pas.earthlink.net>
Anne & Lynn Wheeler wrote:
> "Paul Mansour" <paul_at_carlislegroup.com> writes:
>> I've just read "The Default Values Approach to Missing Information" in >> Date's Database Writings 1989-1991. [...]
>
> old posting that references a dec92 article in database programming
> and design by date on dealing with unknown values titled "An
> Explanation of why three-valued logic is a mistake (Why Accept Wrong
> Answers?)"
> http://www.garlic.com/~lynn/2003q.html#40 How to cope with missing values - NULLS?
> http://www.garlic.com/~lynn/2003q.html#41 How to cope with missing values - NULLS?
Getting 404 errors on those - can you confirm or correct them?
-- Jonathan Leffler #include <disclaimer.h> Email: jleffler_at_earthlink.net, jleffler_at_us.ibm.com Guardian of DBD::Informix v2005.02 -- http://dbi.perl.org/Received on Mon Mar 20 2006 - 06:36:33 CET