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nitsmooth
Yak Posting Veteran
68 Posts |
 Posted - 2012-09-25 : 10:32:15
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| select * from tablewhere Column like '' or Column like ' ' or Column is nullthe table has 23 Lakh rowsi have two primary keys in the tablethe query is taking almost 12 minutes to run. Is there a was i can speed this up? |
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Lamprey
Master Smack Fu Yak Hacker
4614 Posts |
Posted - 2012-09-25 : 10:55:18
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| What is teh DDL of the table? Do you have any indexes on the table? Just as a side note, the default settings for SQL is to ignore trailing spaces so: Column like '' or Column like ' ', is redundant.Here are some links that might help give you more information about what you can post that will help us help you:http://www.sqlservercentral.com/articles/Best+Practices/61537/http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx |
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prett
Posting Yak Master
212 Posts |
Posted - 2012-09-26 : 06:23:53
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| The reason behind Slow query performance are due to the load on the system, and other times it is because the query is not written to perform as efficiently as possible. Please take a look of this article to improve query performance: http://www.techrepublic.com/blog/datacenter/speed-up-sql-server-database-queries-with-these-tips/173 |
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Slow Query