IS NULL doesn't work as expected in SQL Server 2000 with no Service Pack on it
- by user306825
The following batch executed on different instances of SQL Server 2000 illustrates the problem.
select @@version
create table a
(a int)
create table b
(b int)
insert into a(a) values (1)
insert into a(a) values (2)
insert into a(a) values (3)
insert into b(b) values (1)
insert into b(b) values (2)
select * from a
left outer join (select 1 as test, b from b) as j on j.b = a.a
where j.test IS NULL
drop table a
drop table b
Output 1:
Microsoft SQL Server 2000 - 8.00.194 (Intel X86)
Aug 6 2000 00:57:48
Copyright (c) 1988-2000 Microsoft Corporation
Developer Edition on Windows NT 6.1 (Build 7600: )
(1 row(s) affected)
(1 row(s) affected)
(1 row(s) affected)
(1 row(s) affected)
(1 row(s) affected)
(1 row(s) affected)
a test b
----------- ----------- -----------
(0 row(s) affected)
Output 2:
Microsoft SQL Server 2000 - 8.00.2039 (Intel X86)
May 3 2005 23:18:38
Copyright (c) 1988-2003 Microsoft Corporation
Developer Edition on Windows NT 5.2 (Build 3790: Service Pack 2)
(1 row(s) affected)
(1 row(s) affected)
(1 row(s) affected)
(1 row(s) affected)
(1 row(s) affected)
(1 row(s) affected)
a test b
----------- ----------- -----------
3 NULL NULL
(1 row(s) affected)
If someone encounters the same problem - make sure you have the SP installed!
