秋天吹落的叶 2021-01-22 18:00 采纳率: 100%
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pgsql,根据日期,单价计算收益

有两个表:

表1-买入:

 

表2-卖出:

首先,买入的日期要比卖出低或者等于,然后再从最低价计算。

得到的表应该是:

只是其中一个公司的,实际情况会有多个公司多个股票,我要计算每卖出一笔的收益,收益是以最低单价开始计算,但是多了一个日期判定,即卖出日期前的最低单价开始计算,如果有剩余,则参与下一笔卖出计算。

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  • bj_0163_bj 2021-01-23 20:02
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    select rq,nm,dm,mgs,mdj,myj,rq2,gs,dj,yj
    from (select t.*,sum(gs) over(partition by nm,dm order by rq,dj,rq2) gs_s
    from (
    select a.*,row_number() over (partition by nm,dm,rq2,gs,dj,yj order by rq) rw 
    from (select a.*,b.rq rq2,b.gs,b.dj,b.yj
    from (select a1.*,row_number() over (partition by nm,dm order by rq) rw_1,
    sum(mgs) over(partition by nm,dm order by rq) mgs_s 
    from temp.temp_test_2 a1) a 
    join temp.temp_test_1 b
    on a.nm=b.nm and a.dm=b.dm
    where a.rq>=b.rq) a 
    ) t 
    where rw=1) t1
    where gs_s-mgs_s <=0
    union all
    select rq,nm,dm,mgs,mdj,myj,rq2,gs-gs_s+mgs_s,dj,yj
    from (select t.*,sum(gs) over(partition by nm,dm order by rq,dj,rq2) gs_s
    from (
    select a.*,row_number() over (partition by nm,dm,rq2,gs,dj,yj order by rq) rw 
    from (select a.*,b.rq rq2,b.gs,b.dj,b.yj
    from (select a1.*,row_number() over (partition by nm,dm order by rq) rw_1,
    sum(mgs) over(partition by nm,dm order by rq) mgs_s 
    from temp.temp_test_2 a1) a 
    join temp.temp_test_1 b
    on a.nm=b.nm and a.dm=b.dm
    where a.rq>=b.rq) a 
    ) t 
    where rw=1) t2
    where gs_s-mgs_s >0 and gs>gs_s-mgs_s
    union all 
    select b.rq,b.nm,b.dm,b.mgs,b.mdj,b.myj,a.rq2,a.gs,a.dj,a.yj
    from 
    (select rw_1,rq2,case when gs>gs_s-mgs_s then gs_s-mgs_s else gs end gs,dj,yj
    from (select t.*,sum(gs) over(partition by nm,dm order by rq,dj,rq2) gs_s
    from (
    select a.*,row_number() over (partition by nm,dm,rq2,gs,dj,yj order by rq) rw 
    from (select a.*,b.rq rq2,b.gs,b.dj,b.yj
    from (select a1.*,row_number() over (partition by nm,dm order by rq) rw_1,
    sum(mgs) over(partition by nm,dm order by rq) mgs_s 
    from temp.temp_test_2 a1) a 
    join temp.temp_test_1 b
    on a.nm=b.nm and a.dm=b.dm
    where a.rq>=b.rq) a 
    ) t 
    where rw=1) t3
    where gs_s-mgs_s >0) a 
    join (select a1.*,row_number() over (partition by nm,dm order by rq) rw_1,
    sum(mgs) over(partition by nm,dm order by rq) mgs_s 
    from temp.temp_test_2 a1) b 
    on a.rw_1+1=b.rw_1
    order by rq,dj
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