Re: Null in the where-clause

> I've got a problem with the "null"-statement within the where-clause.
> I installed the postgres-server 7.2.1 on a Suse Linux machine.
> Then I imported an existing databasedump.
> But when I make the following query:
> select * from tbl_categories where categoryid=null;
> I get 0 rows as result, but there are several records, which
> corrsponds to my query.
> What could be the problem? Do I have to reinstall the server
> with a special parameter?
>

Try this:

select * from tbl_categories where categoryid is null;