MySQL Forums
Forum List  »  Optimizer & Parser

Re: Problem with LEF OUTER JOIN
Posted by: KimSeong Loh
Date: March 26, 2006 08:05PM

Did you actually try this statement with the data you provided?
select * from tblCat C LEFT OUTER JOIN tblCatDet D ON C.ID=D.CatID WHERE D.color='2'

If I am not wrong, this will return emtpy set in the result, since there is no rows satisfy the condition D.color='2'

Maybe you want to try
select * from tblCat C LEFT OUTER JOIN tblCatDet D ON C.ID=D.CatID WHERE D.color='clr'
and compare it with
select * from tblCat C LEFT OUTER JOIN tblCatDet D ON C.ID=D.CatID WHERE D.color='clr' OR D.color IS NULL

Options: ReplyQuote


Subject
Views
Written By
Posted
3247
March 19, 2006 04:01PM
1845
March 19, 2006 05:48PM
2447
March 20, 2006 04:04AM
2229
March 20, 2006 10:31AM
2023
March 20, 2006 03:02PM
1872
March 20, 2006 03:34PM
1946
March 21, 2006 06:35PM
1933
March 22, 2006 05:10PM
1974
March 22, 2006 07:06PM
2108
March 24, 2006 02:01PM
Re: Problem with LEF OUTER JOIN
2157
March 26, 2006 08:05PM
2146
March 26, 2006 11:40PM


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.