我需要一些帮助为SQL Server编写此查询。嵌套部分使此查询花费将近一分钟的时间来运行27,000条记录。我认为它需要一个临时表，但是我以前没有做过。有人可以告诉我我该怎么做吗？
SELECT
r.ID,
r.CloseDate,
r.RepairOrderStatus 'Repair Status',
p.PartNumber ModInPN,
p.PartDescription ModInDesc,
pr.RMANumber,
c.FullName OpsTech,
(SELECT COUNT (*)
FROM dbo.TestPartsReplaced tpr
WHERE tpr.RepairID = r.ID) Qty
FROM dbo.RepairTicket r LEFT JOIN dbo.Parts p ON r.ModuleInPartID = p.ID
LEFT JOIN dbo.PartReturn pr ON r.PartReturnID = pr.ID
LEFT JOIN dbo.Contact c ON c.ID = r.ContactTechID
尝试这个....
SELECT
r.ID,
r.CloseDate,
r.RepairOrderStatus 'Repair Status',
p.PartNumber ModInPN,
p.PartDescription ModInDesc,
pr.RMANumber,
c.FullName OpsTech,
Qty.[Count] AS Quantity
FROM dbo.RepairTicket r LEFT JOIN dbo.Parts p ON r.ModuleInPartID = p.ID
LEFT JOIN dbo.PartReturn pr ON r.PartReturnID = pr.ID
LEFT JOIN dbo.Contact c ON c.ID = r.ContactTechID
LEFT JOIN (SELECT RepairID , COUNT (*) AS [Count]
FROM dbo.TestPartsReplaced
GROUP BY RepairID) Qty ON Qty.RepairID = r.ID
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我来说两句