我有一个问题是得到最大值和最小值,我希望结果是XXL和XXS
SELECT MAX(tblSizeXL.SizeXLName) AS maxSize,
MIN(tblSizeXL.SizeXLName) AS minSize
FROM Product
JOIN tblSizeXL ON Product.SizeXLID = tblSizeXL.SizeXLID
WHERE (Product.GroupID = @GroupID)
GROUP BY tblSizeXL.SizeXLID
ORDER BY tblSizeXL.SizeXLID DESC
SizeXLID SizeXLName
-----------------------
1 XXS
2 XS
3 S
4 M
5 L
6 XL
7 XXL
8 XXXL
答案 0 :(得分:1)
您将不得不进行内部查询以获取您正在寻找的数据:
SELECT max.SizeXLName as maxSize, min.SizeXLName as minSize
FROM
(SELECT MAX(tblSizeXL.SizeXLID) as MaxSizeXLID, MIN(tblSizeXL.SizeXLID) as MinSizeXLID
FROM Product
JOIN tblSizeXL ON Product.SizeXLID = tblSizeXL.SizeXLID
WHERE Product..GroupID = @GroupID) base
JOIN tblSizeXL max ON max.SizeXLID = base.MaxSizeXLID
JOIN tblSizeXL min on min.SizeXLID = base.MinSizeXLID
答案 1 :(得分:0)
删除group by子句,您的查询应该没问题。