MySQL查询跳转记录

Question

我有以下查询。

SELECT month(DMY) Month, 
    Year(DMY) Year, 
    Date(DMY) Date, 
    COD_VENDED, 
    @running_total := @running_total + Coalesce(TotalImport, 0) as TotalImport 
from 
(
    SELECT Days.dmy, 
    g.COD_VENDED, 
    TotalImport 
    FROM Days 
    left join 
    (
    select FECHA_EMIS, 
     COD_VENDED, 
     sum(IMPORTE) TotalImport 
    from GVA12 
    group by Date(FECHA_EMIS), Year(FECHA_EMIS) 
) g 
    on date(Days.DMY) = date(g.FECHA_EMIS) 
    and g.COD_VENDED='EX' 
    and Month(g.FECHA_EMIS)=Month(curDate()) 
    and Year(g.FECHA_EMIS)=Year(curDate()) 
    WHERE month(Days.dmy)=Month(curDate()) 
) src, (SELECT @running_total := 0 AS dummy) dummy 

问题是它在数据库中跳转记录。

select FECHA_EMIS, 
    COD_VENDED, 
    sum(IMPORTE) TotalImport 
from GVA12 
group by Date(FECHA_EMIS), Year(FECHA_EMIS) 

你只在Date()和Year()分组结果的COD_VENDED的价值：

问题是在这个SQL Fiddle

Answer 1

看来，问题是你内心的子查询复制不会是恒定的。

然后当你到您的查询的下一部分您筛选仅记录：

g.COD_VENDED='EX' 

因此，如果子查询返回的值是不是EX那么之后就被过滤掉。

你可能要考虑COD_VENDED子查询分组：

SELECT month(DMY) Month, 
    Year(DMY) Year, 
    Date(DMY) Date, 
    COD_VENDED, 
    @running_total := @running_total + Coalesce(TotalImport, 0) as TotalImport 
from 
(
    SELECT Days.dmy, 
    g.COD_VENDED, 
    TotalImport 
    FROM Days 
    left join 
    (
    select FECHA_EMIS, 
     COD_VENDED, 
     sum(IMPORTE) TotalImport 
    from GVA12 
    group by Date(FECHA_EMIS), Year(FECHA_EMIS), COD_VENDED 
) g 
    on date(Days.DMY) = date(g.FECHA_EMIS) 
    and g.COD_VENDED='EX' 
    and Month(g.FECHA_EMIS)=Month(curDate()) 
    and Year(g.FECHA_EMIS)=Year(curDate()) 
    WHERE month(Days.dmy)=Month(curDate()) 
) src, (SELECT @running_total := 0 AS dummy) dummy 

见SQL Fiddle with Demo