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creane
Starting Member
11 Posts |
 Posted - 2003-09-02 : 07:25:43
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| Hi, Ive a problem whereby my sql query (sql server 2000) is doing a clustered index scan on a table which is causing problems in an application.The query is SELECT emailaddress, datejoined, nationality, status FROM table WHERE status < max_status_variable and nopromos = '0' order by emailaddress emailaddress is a clustered index, status is in a covering index with datejoined (non clustered index obviously status,datejoined being the order of the index).. Using the query execution plan in sql analyser is shows that the status < max_status_variable is not using the covering index at all (there are a million records in teh database table)...if I run the query on development it works fine, anybody any ideas on how to run the query effeciently or is it a matter of drop and creating different indexes |
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AndrewMurphy
Master Smack Fu Yak Hacker
2916 Posts |
Posted - 2003-09-02 : 08:43:20
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| have a look at index hints....this may improve your problem....but they are not perfect in all situationsSELECT emailaddress, datejoined, nationality, statusFROM table with index (3))WHERE status < max_status_variable and nopromos = '0' order by emailaddress |
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query not using index