SELECT a.FundIDRecv,a.SubscribeDt, b.FundName,
(
SELECT SUM(c.PricePerWeek)
FROM tbl_Hive c
WHERE c.FundID IN
(
SELECT FundID from tbl_FundStatic
WHERE FundID IN
(
SELECT FundIDSend
FROM tbl_FundSubscriptions
WHERE FundIDRecv = a.FundIDRecv
AND SubscribeDt >= subdate(CURDATE(), INTERVAL weekday(CURDATE()) DAY)
)
AND UserID = '14'
)
) as Price
FROM tbl_FundSubscriptions a, tbl_Hive b
WHERE a.FundIDRecv = b.FundID
AND a.SubscribeDt >= subdate(CURDATE(), INTERVAL weekday(CURDATE()) DAY)
AND a.FundIDRecv IN
(
SELECT FundIDRecv
FROM tbl_FundSubscriptions
WHERE FundIDSend IN (
SELECT FundID
FROM tbl_FundStatic
WHERE UserID = '14'
)
)
GROUP BY FundIDRecv
此查询需要大量时间来获取数据。MySQL:查询优化
如何优化此查询以使其执行并获取结果的速度比它快?
取决于。你的表和索引是什么?这是一个很大的区别。 – 2011-03-16 11:04:22
指出查询应该做什么。 – Pentium10 2011-03-16 11:12:06
请给出您的查询的数据库结构(表/索引)和执行计划(解释) – oryol 2011-03-16 11:25:59