在 Access 中对多个表使用聚合函数答案

【问题标题】：use Aggregate function with multiple table in Access在 Access 中对多个表使用聚合函数
【发布时间】：2013-05-19 09:20:34
【问题描述】：

我有四个表 Items、Customer、Invoice_summary、Invoice_details。在这里，我想加入这四个表并获取特定 item_code 和特定日期范围的 Sum(Invoice_details.Item_quntity) 和 Sum(Invoice_details.Price) 。主要栏目如下：

Invoice_summary :Inv_num,Inv_date,Cus_id,Total 
Items           :Item_code,Item_name,Unit_price
Invoice_details :Inv_num,Item_code,Item_qty,Price
Customers       :Cus_id,Cus_name,Route

这是我目前拥有的。这返回不止一行（整个项目名称），我只需要特定项目代码。有人可以解释我哪里出错了。

SELECT Invoice_Table.Item_Code, Items.Item_Name, 
       (Select sum(Invoice_Table.Item_Quntity)  from (Invoice_Table INNER JOIN Invoice ON Invoice_Table.Inv_Num = Invoice.Inv_Num) where ((Invoice_Table.Item_Code=[?]) And Invoice.inv_date Between #3/4/2013# And #6/4/2013#) group BY Invoice_Table.Item_Code) AS Quntity, 
       (Select sum(Invoice_Table.Price)  from (Invoice_Table INNER JOIN Invoice ON Invoice_Table.Inv_Num = Invoice.Inv_Num) where ((Invoice_Table.Item_Code=[?]) And Invoice.inv_date Between #3/4/2013# And #6/4/2013#) group BY Invoice_Table.Item_Code) AS Price 
FROM Invoice_Table 
INNER JOIN Items ON Invoice_Table.Item_Code = Items.Item_Code 
GROUP BY Invoice_Table.Item_Code, Items.Item_Name;

【问题讨论】：

标签： mysql sql ms-access vba

【解决方案1】：

此查询应给出您感兴趣的总和。

select Inv_num, Item_code, 
       sum(Item_qty) item_code_qty, 
       sum(Price) item_code_price
from invoice_details
group by Inv_num, Item_code

看起来应该在发票汇总表中找到日期范围。看起来 Invoice_summary 和 Invoice_details 应该可以在 Inv_num 上连接。

select inv_s.Inv_num, inv_s.Inv_date, inv_s.Cus_id, inv_s.Total,
       inv_t.item_code_qty, inv_t.item_code_price
from Invoice_summary inv_s
inner join (select Inv_num, Item_code, 
                   sum(Item_qty) item_code_qty, 
                   sum(Price) item_code_price
            from invoice_details
            group by Inv_num, Item_code
            ) inv_t
        on inv_s.Inv_num = inv_t.Inv_num
where inv_s.Inv_date between ? and ?;

为了解决这个问题，将其他两个表的键连接起来，并将它们的一些列添加到 SELECT 子句。

select inv_s.Inv_num, inv_s.Inv_date, inv_s.Cus_id, cus.Cus_name, inv_s.Total,
       inv_t.item_code_qty, inv_t.item_code_price,
       items.name
from Invoice_summary inv_s
inner join (select Inv_num, Item_code, 
                   sum(Item_qty) item_code_qty, 
                   sum(Price) item_code_price
            from invoice_details
            group by Inv_num, Item_code
            ) inv_t
        on inv_s.Inv_num = inv_t.Inv_num
inner join items on items.Item_code = inv_t.Item_code
inner join Customers cus on cus.Cus_id = inv_s.Cus_id
where inv_s.Inv_date between ? and ?;

【讨论】：

感谢您的考虑。但我仍然无法使用日期范围过滤数据。它要求 In_num 作为输入。我已经上传了样本。你能解释一下我哪里出错了吗？ sdrv.ms/116eueC">
"In_num" 不是您表中的列。我猜你打错字了，你的意思是“Inv_num”。
哦..对不起先生，这是错字。我在弄乱了几个小时后终于弄清楚了。我加入了这个表格并过滤了日期范围、路线和 cus_id。非常感谢你教我如何解决这样的问题。（两个竖起大拇指）

【解决方案2】：

试试这个..

Select ID.Item_qty,ID.Price,I.Item_code from Invoice_summary IS 
INNER JOIN Invoice_details ID ON ID.Inv_num=IS.Inv_num
INNER JOIN Customers C ON C.Cus_id=IS.Inv_num
INNER JOIN Items I ON I.Item_code=ID.Item_code

【讨论】：