use Aggregate function with multiple table in Access - mysql

Question

I have Four tables Items,Customer,Invoice_summary,Invoice_details. Here I want to join these four tables and to get Sum(Invoice_details.Item_quntity) and Sum(Invoice_details.Price) for a specific item_code and for a specific date range . Main Columns are as follows:
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
Here is what I currently have.this return more than a row(whole itemsnames) i need only for a specific item code.Could someone explain where I am going wrong.
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;

Answer 1

The sums you're interested in should be given by this query.
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
It looks like the date range should be found in the invoice summary table. It looks like Invoice_summary and Invoice_details should be joinable on Inv_num.
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 ?;
And to round that out, join the other two tables on their keys, and add some of their columns to the SELECT clause.
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 ?;

Answer 2

Try this..
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