[MSSQL] 일별,주별,월별 통계

-- 일단위 
Select DATEPART(dd, order_dt), count(order_no) From 주문테이블 
group by DATEPART(dd, order_dt) 
order by DATEPART(dd, order_dt) 
 
-- 주 단위 
Select DATEPART(ww, order_dt), count(order_no) From 주문테이블 
group by DATEPART(ww, order_dt) 
order by DATEPART(ww, order_dt) 
 
-- 월단위 
 Select DATEPART(mm, order_dt), count(order_no) From 주문테이블 
group by DATEPART(mm, order_dt) 
order by DATEPART(mm, order_dt) 
 
-- 년단위 
Select DATEPART(yy, order_dt), count(order_no) From 주문테이블 
group by DATEPART(yy, order_dt) 
order by DATEPART(yy, order_dt) 
 
-- 분기별 
SELECT A.memyear,A.AA,SUM(A.CNT) AS CNT 
FROM ( 
Select DATEPART(yy, regdate) as memyear,DATEPART(mm, regdate) as memmonth,  count(regdate) as cnt 
,(CASE DATEPART(mm, regdate) 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 SMEM01MEM 
group by DATEPART(mm, regdate),DATEPART(yy, regdate) 
--order by DATEPART(ww, regdate) 
) A 
group by A.memyear,A.AA 
order by A.memyear,A.AA