I am getting two different execution plans for the same query only by changing the value in the predicate, the first one uses nested loops and the other one hash join which takes a lot longer. ...
A query executed in a backup of a database is performing better than if executed in the original database
We have two databases with the same data, let's call it Database A which is the original and Database B which is the backup from Database A. A query is performing much better in Database B for example ...
I have been working on obtaining a paginated result from a table in my database (11g). While I have a query that does work (ie, the result is correct) it does not perform as well as I'd like to and I ...
A weekly, scheduled, schema wide stats update was run on our Oracle 11R2 RAC cluster on Sunday. One of the queries had no apparent data or code change but now runs at 3 hours instead of 20 minutes. ...
Background: Please review my related question that involves SQL Server : Interpreting SQL Server's Showplan XML I now have a very nice looking Execution Plan display for SQL Server (as a result of my ...