브 루트 포스 용액
WITH MonthData AS (
SELECT (YEAR(Date) - 2000) * 12 + MONTH(Date) AS MonthNumber
,Count1
,Count2
FROM Table
)
,QuarterData AS (
SELECT MAX(MonthNumber) AS MonthNumber
,SUM(Count1)/COUNT(1) AS MeanCount1
,SUM(Count2)/COUNT(1) AS MeanCount2
,SUM(Count1) AS SumCount1
,SUM(Count2) AS SumCount2
FROM MonthData
GROUP BY MonthNumber/3
UNION ALL
SELECT MAX(MonthNumber)
,SUM(Count1)/COUNT(1)
,SUM(Count2)/COUNT(1)
,SUM(Count1)
,SUM(Count2)
FROM MonthData
GROUP BY (MonthNumber + 1)/3
UNION ALL
SELECT MAX(MonthNumber)
,SUM(Count1)/COUNT(1)
,SUM(Count2)/COUNT(1)
,SUM(Count1)
,SUM(Count2)
FROM MonthData
GROUP BY (MonthNumber + 2)/3
)
SELECT DATEADD(month, MonthNumber, '20000101') AS Period
,MeanCount1
,MeanCount2
,SumCount1
,SumCount2
FROM QuarterData