Can anyone give me a optimized Query replaced by This query::

Question

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
Message was edited by:
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Answer 1

No guarantees, but this may be faster:
SELECT user_id
FROM user
WHERE group_id = 1
INTERSECT
SELECT user_id
FROM technician_schedule
WHERE day_id IN (1,2)
GROUP BY user_id
HAVING COUNT(*) = 2
INTERSECT
SELECT user_id
FROM technician_certification
WHERE certification_id = 33
INTERSECT
SELECT user_id
FROM technician_sc
WHERE service_category_id IN ( 1, 5, 8, 9, 10 )
GROUP BY user_id
HAVING COUNT(*) = 5
INTERSECT
SELECT user_id
FROM technician_tool
WHERE tool_id IN ( 1, 3, 4, 5 )
GROUP BY user_id
HAVING COUNT(*) = 4
ORDER BY user_idTTFN
John