在 MS Access 数据库中运行查询时出错

Question

select 
    tblproduct.itemname As Item_Name, 
    ((sum(tblpurchase.[case]) * tblproduct.pc)-
    ((sum(tblsale.[case]) * tblproduct.pc)+(sum(tblsale.nos)))) 
As Remaining_Stock
From 
    (tblproduct 
left Join 
    tblpurchase on tblproduct.itemname=tblpurchase.itemname) 
left join 
    tblsale on tblproduct.itemname = tblsale.itemname 
where 
    tblproduct.itemname='Combo Soap' 
group by 
    tblproduct.itemname

屏幕截图中显示错误。我无法运行此查询。请帮助我找到如何解决并运行此查询的解决方案！谢谢你。

Answer 1

试试这个：

select 
    tblproduct.itemname As Item_Name, 
    sum(tblpurchase.[case] * tblproduct.pc) -
    sum(tblsale.[case] * tblproduct.pc) +
    sum(tblsale.nos) As Remaining_Stock
from

<snip>

输出：

Answer 2

感谢所有帮助我前进的人，让我能够解决这个问题。

SELECT tblproduct.itemname, Sum(tblpurchase_grouped.total_case) * Sum(tblproduct.pc) + Sum(tblpurchase_grouped.total_nos)) - (Sum(tblsale_grouped.total_case) * Sum(tblproduct.pc)+Sum(tblsale_grouped.total_nos)) AS Total FROM (tblproduct LEFT JOIN (SELECT itemname, SUM(nos) AS total_nos, SUM([case]) AS total_case FROM tblsale GROUP BY itemname )  AS tblsale_grouped ON tblproduct.itemname = tblsale_grouped.itemname) LEFT JOIN (SELECT itemname, SUM(nos) AS total_nos, SUM([case]) AS total_case FROM tblpurchase GROUP BY itemname )  AS tblpurchase_grouped ON tblproduct.itemname = tblpurchase_grouped.itemname WHERE tblproduct.itemname='Maza' GROUP BY tblproduct.itemname