Optimizing Oracle query
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by Omnipresent
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Published on 2010-03-21T11:55:39Z
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2010/03/21
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Hit count: 457
SELECT MAX(verification_id)
FROM VERIFICATION_TABLE
WHERE head = 687422
AND mbr = 23102
AND RTRIM(LTRIM(lname)) = '.iq bzw'
AND TO_CHAR(dob,'MM/DD/YYYY')= '08/10/2004'
AND system_code = 'M';
This query is taking 153 seconds to run. there are millions of rows in VERIFICATION_TABLE.
I think query is taking long because of the functions in where clause. However, I need to do ltrim rtrim on the columns and also date has to be matched in MM/DD/YYYY format. How can I optimize this query?
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