Re: Query optimize on large database
why not just:
SELECT d.owner_id, COUNT(*) AS kolvo
FROM data d
WHERE d.owner_id = @user_id
GROUP BY d.owner_id
?
I see no need to JOIN self here
Subject
Views
Written By
Posted
1301
July 13, 2016 01:40AM
763
July 15, 2016 05:12PM
736
July 16, 2016 04:15AM
708
July 16, 2016 12:09PM
766
July 16, 2016 12:36PM
734
July 16, 2016 02:46PM
773
July 17, 2016 11:22AM
747
July 18, 2016 04:28AM
708
July 18, 2016 08:40AM
Re: Query optimize on large database
698
July 20, 2016 04:46AM
765
July 20, 2016 08:06AM
718
July 20, 2016 09:29AM
746
July 21, 2016 04:35AM
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.