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Urgent Optimized QUERY needed::
Posted by: Mohammed Abdullah All Marbin
Date: March 04, 2006 03:27PM

Hi All,
I am marbin from UK. Actually i am an OCP(Oracle certified profesional). Now i am working on a project which is run under mysql 4... versions. I have a query with some conditions. I have to retrieve some record which is fetched from 5/6 tables. But the main problem is the query takes too long time. I can tried with it in oracle very easily using view and INTERSECT command. But in mysql versions doesnt support INTERSECT. I give you full query. If you guys give me a solution , how to reduce the query time or more faster with any change of my database then i will be greatful to him.

SELECT user.user_id
FROM user
where user.group_id =1
and user.user_id IN (SELECT user_id FROM technician_schedule WHERE day_id IN(1,2) GROUP BY user_id HAVING count( day_id ) =2)
AND user.user_id IN (SELECT user_id FROM technician_certification WHERE certification_id=33)
AND user.user_id IN (SELECT user_id FROM technician_sc WHERE service_category_id IN ( 1, 5, 8, 9, 10 ) GROUP BY user_id HAVING count( service_category_id)=5)
AND user.user_id IN (SELECT user_id FROM technician_tool WHERE tool_id IN ( 1, 3, 4, 5 ) GROUP BY user_id HAVING count( tool_id ) =4)
ORDER BY user.user_id


Please give me a optimal solution as soon as possible.
Hope you guys knows mysql better than me.

Thanking you

Mohammed Abdullah All Marbin
Oracle Certified Professional
United Kingdom
Cell: +447793370547
E-Mail: marbin@gmail.com

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