月环比sql实现

##月环比

with temp as(
-- 对fct_sales的数据按照日期进行聚合
select dimDateID
			,round(SUM(AMT),0) AS AMT 
from dw.fct_sales 
WHERE dimMemberID <> 0
group by dimDateID
)
select   substr(a.d,1,7) as 'month' 
        ,STR_TO_DATE(a.d,'%Y-%m-%d') as time
				,a.AMT
				,b.dd
				,b.originalday
				,b.AMT as AMT_last 
				,(a.AMT-b.AMT)/b.AMT as month_rate 
from 
(select  DATE_FORMAT(dimDateID,'%Y-%m-%d') as d 
        ,AMT  
 from temp
) a  
left join 
(select  DATE_ADD(DATE_FORMAT(dimDateID,'%Y-%m-%d'),INTERVAL 1 month ) as dd 
        ,DATE_FORMAT(dimDateID,'%Y-%m-%d')as originalday
			  ,AMT  
 from temp  
) b
on a.d=b.dd;