Re: Optimizing left outer join query
Yes, you are right with the NULL=NULL, this will not be true, so it will not be joined, and then the is null will still be cause by the non matching rows in the left join.
I missed the point of NULL=NULL.
Subject
Views
Written By
Posted
14299
September 24, 2006 11:40PM
4796
September 25, 2006 03:00AM
4265
September 25, 2006 04:54AM
4515
September 25, 2006 08:09AM
3773
September 25, 2006 09:55PM
3612
September 26, 2006 03:35AM
3284
September 26, 2006 03:46AM
5117
September 26, 2006 04:06AM
Re: Optimizing left outer join query
3165
September 26, 2006 06:31PM
Sorry, you can't reply to this topic. It has been closed.
Content reproduced on this site is the property of the respective copyright holders.
It is not reviewed in advance by Oracle and does not necessarily represent the opinion
of Oracle or any other party.