Re: why must i specify an index in query?
If it needs to read data from the table, and Left Join requires that it read all rows, it may decide the index isn't worth it.
We could chase down the complexities of the original convoluted query, but we'd need Show Create Table results for usersmobile as well as enough Inserts for each table to replicate the problem.
Subject
Views
Written By
Posted
1747
July 02, 2015 10:31AM
884
July 02, 2015 11:46AM
1537
July 02, 2015 12:46PM
991
July 02, 2015 01:58PM
1017
July 02, 2015 02:49PM
937
July 02, 2015 09:47PM
904
July 02, 2015 10:36PM
1043
July 03, 2015 08:10AM
Re: why must i specify an index in query?
934
July 03, 2015 03:06PM
901
July 03, 2015 09:12PM
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.