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-- 주 단위

Select DATEPART(ww, dates), count(order_no) From 테이블

group by DATEPART(ww, dates)

order by DATEPART(ww, dates)


 


-- 월단위

Select DATEPART(mm, dates), count(order_no) From tables

group by DATEPART(mm, dates)

order by DATEPART(mm, dates)


 


-- 년단위

Select DATEPART(yy, dates), count(order_no) From tables

group by DATEPART(yy, dates)

order by DATEPART(yy, dates) 





--분기별

SELECT A.memyear,A.AA,SUM(A.CNT) AS CNT

FROM ( 

Select DATEPART(yy, dates) as memyear,DATEPART(mm, dates) as memmonth,  count(dates) as cnt

,(CASE DATEPART(mm, dates) WHEN '1' THEN '1' WHEN '2' THEN '1' WHEN '3' THEN '1' 

WHEN '4' THEN '2' WHEN '5' THEN '2' WHEN '6' THEN '2' 

WHEN '7' THEN '3' WHEN '8' THEN '3' WHEN '9' THEN '3' 

WHEN '10' THEN '4'

WHEN '11' THEN '4'

WHEN '12' THEN '4' ELSE '0' END) AS AA

From Tables

group by DATEPART(mm, dates),DATEPART(yy, dates)

--order by DATEPART(ww, dates) 

) A

group by A.memyear,A.AA

order by A.memyear,A.AA


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