MySQL查詢跳轉記錄

Question

我有以下查詢。

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 

問題是它在數據庫中跳轉記錄。

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

你只在Date()和Year()分組結果的COD_VENDED的價值：

問題是在這個SQL Fiddle

Answer 1

看來，問題是你內心的子查詢複製不會是恆定的。

然後當你到您的查詢的下一部分您篩選僅記錄：

g.COD_VENDED='EX' 

因此，如果子查詢返回的值是不是EX那麼之後就被過濾掉。

你可能要考慮COD_VENDED子查詢分組：

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 

見SQL Fiddle with Demo