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  3. August 2010

Re: Sql Question

Let me guess: comparisons to NULL result in NULL. Also aggregate operations containing NULL result in NULL. --Loyd

On Aug 17, 2010, at 19:04, Alan Campin <alan0307d@xxxxxxxxx> wrote:

As the man said, "Very interesting" . Thanks

On Tue, Aug 17, 2010 at 5:40 PM, Dennis Lovelady <iseries@xxxxxxxxxxxx>wrote:

Dang. here I sit, corrected. :) It was about time, since my last prior
correction was over ten minutes ago.

From Wikipedia: http://en.wikipedia.org/wiki/Null_%28SQL%29

SELECT *
FROM sometable
WHERE num <> 1; -- Rows where num is NULL will not be returned,
-- contrary to many users' expectations.

Dennis Lovelady
http://www.linkedin.com/in/dennislovelady




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