SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Tuning a query help


Tuning a query help

Author
Message
Kwisatz78
Kwisatz78
Ten Centuries
Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)

Group: General Forum Members
Points: 1067 Visits: 1821
Hi all thanks for the replies I will be testing and posting results back as soon as I can. Its our last day at work here and I have various tasks I need to get done before we go on holiday, so have a Merry Christmas and Happy New Year, and see you in 2013.

Thanks
Sean Lange
Sean Lange
One Orange Chip
One Orange Chip (25K reputation)One Orange Chip (25K reputation)One Orange Chip (25K reputation)One Orange Chip (25K reputation)One Orange Chip (25K reputation)One Orange Chip (25K reputation)One Orange Chip (25K reputation)One Orange Chip (25K reputation)

Group: General Forum Members
Points: 25952 Visits: 17519
Bhuvnesh (12/20/2012)
Bhuvnesh (12/20/2012)
Sean Lange (12/20/2012)

pr.price <> 9999.99


Try making this a SARGable predicate by removing the <> and replacing with > OR <

pr.price < 9999.99 OR pr.price > 9999.99
new learning for me. i am straight away going to test it :-)

Sean , i did a test btu result are not impressive or i am overlooking somthing (OR amount of data is small ? )




It was low hanging fruit and only likely a piece of the puzzle. We did get ddl but without any data it is hard to test performance.

The reason you are not seeing any difference in your two queries is because you are selecting only from a single table which is going to be an index scan. Are you familiar with SARGability? Not equals is a nonSARGable predicate. Do a quick search for sargable and you will find lots of material covering the topic.

_______________________________________________________________

Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

Need to split a string? Try Jeff Modens splitter.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs
Understanding and Using APPLY (Part 1)
Understanding and Using APPLY (Part 2)
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search