2个日期之间的最长日期

Question

如何在列中找到最新日期，但将其限制在2个日期

之间

SELECT [Weight]
FROM [weighinevent] w
WHERE [Date] = (SELECT MAX([Date]) WHERE [Date] BETWEEN @StartDate AND @EndDate AND w.[userid] = @userid )

这就是我所拥有的。这是对的吗？

Answer 1

不，这不正确。子查询也需要定义它们正在选择的表。但您可以按日期订购并仅拍摄第一条记录

SELECT top 1 Weight
FROM weighinevent
WHERE Date BETWEEN @StartDate AND @EndDate 
AND userid = @userid
ORDER BY Date DESC