Re: NULL comparisions
From: Stephan Born <stephan.born_at_beusen.de>
Date: Fri, 15 Oct 1999 09:04:03 +0200
Message-ID: <3806D1E2.FFE06C02_at_beusen.de>
Date: Fri, 15 Oct 1999 09:04:03 +0200
Message-ID: <3806D1E2.FFE06C02_at_beusen.de>
> Hi,
>
> How do I check if two textboxes (say box1 and box2) are both empty. I am
> testing for equality.
> Apparently even if both are empty, they are still not considered equal. So
> if (box1 = box2) always
> returns false when both boxes are empty. I want it to return true. Is
> there a special check for null values?
>
> Thanks.
try
select...
from...
where
(box1 = box2) or
(box1 is null and box2 is null)
Hope this will help, let me know.
Regards, Stephan
-- --------------------------------------------------------------- Dipl.-Inf. (FH) Stephan Born | beusen Consulting GmbH fon: +49 30 549932-17 | Landsberger Allee 392 fax: +49 30 549932-29 | 12681 Berlin mailto:stephan.born_at_beusen.de | Germany ---------------------------------------------------------------Received on Fri Oct 15 1999 - 09:04:03 CEST