SQL Server：SUM DISTINCT GROUP BY

问题描述

我目前正在创建一个查询来总结下面的代码

select distinct
    opch.docentry as 'AP Invoice #',pch1.linenum as 'AP Invoice Line #',pch1.itemcode as 'Item Code',pch1.dscription as 'Item Name',pch1.freetxt as 'Free Text',pch1.priceafvat as 'Gross Price',pch1.quantity as 'Quantity',pch1.gtotal as 'Gross Total'
from 
    opch
inner join 
    pch1 on opch.docentry = pch1.docentry
inner join 
    opdn on opdn.docentry = pch1.basedocnum
inner join 
    pdn1 on opdn.docentry = pdn1.docentry
inner join 
    opor on opor.docentry = pdn1.basedocnum
inner join 
    por1 on opor.docentry = por1.docentry
where 
    pch1.u_budgetno = '57'
    and opch.canceled = 'N'
    and opdn.docstatus = 'C'
    and opdn.canceled = 'N'
    and opor.docstatus = 'C'
    and opor.canceled = 'N'
order by 
    opch.docentry

这是我试过的总和语句

select 
    opch.docentry,sum(pch1.gtotal)
from
    opch
inner join 
    pch1 on opch.docentry = pch1.docentry
inner join 
    opdn on opdn.docentry = pch1.basedocnum
inner join 
    pdn1 on opdn.docentry = pdn1.docentry
inner join 
    opor on opor.docentry = pdn1.basedocnum
inner join  
    por1 on opor.docentry = por1.docentry
where 
    pch1.u_budgetno = '57'
    and opch.canceled = 'N'
    and opdn.docstatus = 'C'
    and opdn.canceled = 'N'
    and opor.docstatus = 'C'
    and opor.canceled = 'N'
group by 
    opch.docentry,opdn.docstatus

但是它不会返回正确的数量，因为它根据连接的表格复制了一些答案。

就我做错的地方请求帮助。

*更新这是选择不同查询的结果 enter image description here

我的目标是 sum 查询来对 pch1.gtotal 列的结果求和

谢谢。

解决方法

问题在于您在发票和交货单之间进行的连接。你没有加入这条线，所以它会乘以结果。正确的连接是使用 BaseEntry、BaseLine 和 BaseType 完成的。这同样适用于与采购订单的连接。

    select 
        opch.docentry,sum(pch1.gtotal)
    from
        opch
    inner join 
        pch1 on opch.docentry = pch1.docentry
    inner join 
        pdn1 on pdn1.docentry = pch1.baseentry and pdn1.linenum = pch1.baseline and  pdn1.objtype = pch1.basetype
    inner join 
        opdn on opdn.docentry = pdn1.docentry
    inner join 
        por1 on por1.docentry = pdn1.baseentry and por1.linenum = pdn1.baseline and por1.objtype = pdn1.basetype 
    inner join  
        opor on opor.docentry = por1.docentry
    where 
        pch1.u_budgetno = '57'
        and opch.canceled = 'N'
        and opdn.docstatus = 'C'
        and opdn.canceled = 'N'
        and opor.docstatus = 'C'
        and opor.canceled = 'N'
    group by 
        opch.docentry

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