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我有正确打印以下:如何从GROUP BY中选择?
MonthNumber
Users
UserHits
我也需要从dbo.ReportAudienceOverviews
如何更改SQL印刷从Coefficient
列?
SELECT DATEPART(mm, S.DateProcessStatus) as MonthNumber,
--S.DeviceId,
SUM(A.Users) as Users,
SUM(A.UsersHits) as UserHits
FROM dbo.ReportAudienceOverviews A
LEFT JOIN dbo.ReportProcessStatuses S
ON S.StatusId = A.StatusId
AND S.DateProcessStatus >= '2014' AND S.DateProcessStatus < '2015'
--WHERE S.DeviceId = 1 AND A.Coefficient = 20
GROUP BY
DATEPART(mm, S.DateProcessStatus), S.DeviceId
ORDER BY MonthNumber ASC, S.DeviceId ASC
有可能,一般情况下是Coefficient'的'*多*值,它集合了行从这个查询中形成单个输出行 - 那么应该如何选择特定的“系数”值?或者他们应该是加在一起? – 2014-10-01 08:27:43
您有几个选项,例如'Coefficient = MIN(A.Coefficient)'或'..MAX(Coefficient)'或'SUM(Coefficient)'或'AVG(Coefficient)'。如果你想要一个特定行的“系数”,你必须解释你的逻辑。 – 2014-10-01 08:29:15
我对MIN(A.Coefficient) – GibboK 2014-10-01 08:30:05