MSaccess搜索不一致的记录

问题描述

我有一个表INVOICES，其列InvoiceNAME，InvoiceSUM和另一个INVOICEitems，其列InvoiceNAME，ItemNAME，ItemPRICE和ItemQTY。通过InvoiceNAME字段联接的表。

我想从INVOICES表中选择所有行，其中InvoiceSUM不等于与InvoiceNAME相关的ItemPRICE * ItemQTY的总和。换句话说，我想列出不一致的记录，其中InvoiceSUM不等于项目总数。

解决方法

一种方法使用相关的子查询：

select i.*
from invoices as i
where i.invoicesum <> (select sum(ii.price * ii.quantity)
                       from INVOICEitems as ii
                       where ii.InvoiceNAME = i.InvoiceNAME
                      );

,

您可能还希望显示结果集中订单项的值。如果是这样，则联接更合适：

select i.*,ii.item_sum
from invoices as i
inner join (
    select invoice_name,sum(item_qty * item_price) as item_sum
    from invoice_items
    group by invoice_name
)  as ii on ii.invoice_name = i.invoice_name
where i.invoice_sum <> ii.item_sum