SQL根據平均值等比例修改原始值

由於業務需求資料顯示的年度報表數值時每日採集的整點資料的平均值，然而現場人員給我們反饋回來直接就是平均值，但是資料庫中原始儲存的資料是每日每個時間段的整點數值。

sws_st_spb_p 原始資料每天都有數個整點資料：

那麼我所要解決的問題是將sws_st_spb_p 原始資料中需要修改的資料根據修改過後的sws_st_spb_p_copy 中的資料等比例的縮放。

-- 刪除所要修改的原始資料

delete sc from sws_st_spb_p sc
inner
join sws_st_spb_p_copy s
on s.stcd = sc.stcd 
and convert(varchar(10), s.tm, 126)  = convert(varchar(10), sc.tm, 126)
and s.mpcd = sc.mpcd  
where s.tm >='2017-09-01 00:00:00'
and s.tm < '2017-10-01 00:00:00'
and s.mpcd = sc.mpcd
-- 增加的字段
alter
table sws_st_spb_p_copy add r1sum decimal,r2sum decimal,r3sum decimal,rcount decimal ;
select * into sws_st_spb_p_copy1 from sws_st_spb_p;
-- 建立臨時表 aaa
select t.mpcd, sum(t.r1) as r1sum,sum(t.r2) as r2sum,sum(t.r3) as r3sum,count(*) rcount, convert(varchar(10), t.tm, 126) as ttime  
into aaa from (
select s.mpcd,s.r1,s.r2,s.r3,sc.r1 as c1,sc.r2 as c2,sc.r3 as c3, s.tm as tm from sws_st_spb_p_copy1 s 
left
join sws_st_spb_p_copy sc on s.stcd = sc.stcd 
and convert(varchar(10), s.tm, 126)  = convert(varchar(10), sc.tm, 126)
and s.mpcd = sc.mpcd  
where s.tm >='2017-09-01 00:00:00'
and s.tm < '2017-10-01 00:00:00'
and s.mpcd = sc.mpcd
) t  
group
by t.mpcd ,convert(varchar(10), t.tm, 126)
select a.*,s.r1,s.r2 into result from aaa  a
left
join sws_st_spb_p_copy s
on a.mpcd = s.mpcd and a.ttime = s.tm
where s.tm >='2017-09-01 00:00:00'
and s.tm < '2017-10-01 00:00:00'
and s.mpcd = a.mpcd
select t.stcd, t.mpcd,t.r1*(t.c1*rcount)/t.r1sum as r1,t.r2*(t.c2*rcount)/t.r2sum as r2,t.tm
into resultspb from (
select s.stcd, s.mpcd,s.r1,s.r2,s.r3, s.tm as tm,sc.r1 as c1,sc.r2 as c2,sc.r1sum as r1sum,sc.r2sum as r2sum,sc.r3sum as r3sum,sc.rcount as rcount from sws_st_spb_p_copy1 s 
left
join result sc on  
convert(varchar(10), s.tm, 126)  = convert(varchar(10), sc.ttime, 126)
and s.mpcd = sc.mpcd  
where s.tm >='2017-09-01 00:00:00'
and s.tm <='2017-09-30 23:59:00'
and s.mpcd = sc.mpcd
)t ;

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