SUM分析函数应用缺陷及解决办法

基础知识：

SUM函数结合窗口函数over用于聚合某一分区内的数据，可根据窗口滑动的范围来确定是记总，还是在分区中从某行累计到某行：

ROWS BETWEEN unbounded preceding AND current row 是指第一行至当前行的汇总

ROWS BETWEEN current row AND unbounded following 是指当前行到最后一行的汇总

ROWS BETWEEN 1 preceding AND current row 是指当前行的上一行(rownum-1)到当前行的汇总

ROWS BETWEEN 1 preceding AND 1 following 是指当前行的上一行(rownum-1)到当前行的下两行(rownum+2)的汇总

应用：

在求科目余额累计数的时候，每个月的科目不是固定的，当sum函数以年，公司，科目分区时，查询5月某个科目的数据时，分析函数字段应当是从1月到5月该科目的累计数，即使表中5月不存在该科目，5月也应当存在一条从1月到4月的sum字段的累计数。目前发现sum是做不到这样的操作。

解决方案：

写查询片段，不以over函数去sum每月科目的数据后，将月份写死为查询月。这种片段需要写12个（排除特殊期间）。

with cc as (select * from (select v.unitcode,v.unitname,v.yearV,v.subjcode,v.subjname,v.subjlev,v.ts,v.periodv,v.creditamount,v.debitamount,sum(v.creditamount* -1 + v.debitamount) balancefrom  ODS.Odsreyy_V_Gl_Balance@FMSLK vwhere periodv <> '00'group by v.unitcode,v.unitname,v.yearV,v.subjcode,v.subjname,v.subjlev,v.ts,v.periodv,v.creditamount,v.debitamount)union all select * from (select v.unitcode,v.unitname,v.yearV,v.subjcode,v.subjname,v.subjlev,v.ts,v.periodv,0 creditamoun,0 debitamount,sum(v.creditamount* -1 + v.debitamount) balancefrom  ODS.Odsreyy_V_Gl_Balance@FMSLK vwhere periodv = '00'group by unitcode,unitname,yearV,subjcode,subjname,subjlev,ts,periodv)
),
s1 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'01' periodv,creditamount ,debitamount, balancefrom  cc where   periodv <= '01')group by unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv
),
s2 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'02' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '02')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s3 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'03' periodv,creditamount ,debitamount, balancefrom  cc where   periodv <= '03')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s4 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'04' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '04')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
)
,
s5 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'05' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '05')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s6 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'06' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '06')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s7 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'07' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '07')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s8 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'08' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '08')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s9 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'09' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '09')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s10 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'10' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '10')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s11 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'11' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '11')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
),
s12 as (select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,sum(creditamount) creditamount  ,sum(debitamount) debitamount,sum(balance) balancefrom ( select unitcode ,unitname,subjcode,subjname,subjlev,yearv,'12' periodv,creditamount ,debitamount, balancefrom  cc where  periodv <= '12')group by unitcode,unitname,yearV,subjcode,subjname,subjlev,periodv
)SELECT YEARMONTH,unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,SHamount,SHMARK,balance,'YONYOU' CLIENTFROM(SELECT YEARMONTH, M.ELEDIM_OUTPUT1 unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,SHamount,SHMARK,balance FROM (select  yearv||periodv YEARMONTH,unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,creditamount*-1 SHamount,'H' SHMARK,balancefrom(select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,creditamount ,debitamount,balancefrom (select * from s1union all select * from s2union all select * from s3union all select * from s4union all select * from s5union all select * from s6union all select * from s7union all select * from s8union all select * from s9union all select * from s10union all select * from s11union all select * from s12)order by subjcode , periodv)union allselect  yearv||periodv YEARMONTH, unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,debitamount SHamount,'S' SHMARK,balancefrom(select unitcode ,unitname,subjcode,subjname,subjlev,yearv,periodv,creditamount ,debitamount,0  balancefrom (select * from s1union all select * from s2union all select * from s3union all select * from s4union all select * from s5union all select * from s6union all select * from s7union all select * from s8union all select * from s9union all select * from s10union all select * from s11union all select * from s12)order by subjcode , periodv)) SLEFT JOIN MAP_REGOLA_TAB_ELEMENTO M ON M.COD_REGOLA_TAB = 'MAP_BUKRS_YONYOU' AND M.COD_MAPPATURA = 'HI_DATA_GL' AND M.ELEDIM_INPUT2 = S.unitcode
)where unitcode is not null  AND YEARMONTH IN ({IN-YEARMONTH}) AND UNITCODE IN ({IN-ENTITY})order by subjcode

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