Oracle-L: RE: comparing null values

From: Khedr, Waleed <Waleed.Khedr_at_FMR.COM>
Date: Thu, 30 Jan 2003 11:19:59 -0800
Message-ID: <F001.0053F522.20030130111959@fatcity.com>

Use: where whatever not like '%STU% or whatever is null or use: where nvl(whatever ,'[NULL]') not like '%STU%

Regards,

Waleed

-----Original Message-----
Sent: Thursday, January 30, 2003 12:42 PM To: Multiple recipients of list ORACLE-L

Can anyone explain why it is that I seem unable to use 'like' and 'not like'

on columns containing null values. (I am unable to find information regarding this on MetaLink.)

For example:

SQL> select * from tester2;

COL1 COL2 WHATEVER
---- ---- --------
1 1 STUFF
2 2 STUFF
3 3
4 4

SQL> select * from tester2 where whatever not like '%STU%'; no rows selected

My question is why does this not return the 3 & 4 columns?

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Author: Gary Jackson
INET: fred_fred_1_at_hotmail.com

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Author: Khedr, Waleed
INET: Waleed.Khedr_at_FMR.COM

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