Sql query in Microsoft Access - ms-access

Question

I have this query written in Microsoft Access:
SELECT p.artnbr AS [Number],
p.name AS Name,
s.sizename AS Sizes,
s.sizeindex AS SizeIndex,
s.oid AS SizeId,
l.name AS LocationName,
(SELECT od.quantity
FROM orderdetails od
WHERE od.ORDER = (SELECT o.oid
FROM [order] o
WHERE o.active = -1
AND o.location = l.oid)
AND od.productsize = s.oid) AS Quantity
FROM [size] AS s
INNER JOIN (product AS p
INNER JOIN (favorite AS f
INNER JOIN location AS l
ON f.customer = l.customer)
ON p.oid = f.product)
ON p.oid = s.product
WHERE f.customer = #customer
The link below shows tables i used and their relationships.
https://dl.dropbox.com/u/18377860/QueryTables.png
This query returns a correct result, but as u can see i am using a Sub query to get the quantity. I cant figure out how can i rewrite this query using join statements instead of that long sub-query. Any help would be appreciated.
Regards
EDIT: To make it more clear, my query needs to get all unique combinations of (product, size, location) whether they have an [Order] or not and display ordered quantity. If an order does not exist for a particular combination the quantity should be null.
EDIT2:
I managed to build the query and it looks like this:
SELECT p.ArtNbr AS [Number],
p.Name AS Name,
s.SizeName AS Sizes,
s.SizeIndex AS SizeIndex,
s.Oid AS SizeId,
l.Name AS LocationName,
so.qty AS Quantity
FROM ([Size] AS s
INNER JOIN (Product AS p
INNER JOIN (Favorite AS f
INNER JOIN Location AS l
ON f.Customer = l.Customer) ON p.OID = f.Product)
ON p.OID = s.Product)
LEFT JOIN
(SELECT od.ProductSize AS PS,
od.Quantity AS qty,
o.Location as Location
FROM OrderDetails AS od INNER JOIN [Order] AS o ON od.Order = o.OID
WHERE o.Active = -1) AS so ON so.PS = s.OID
WHERE f.Customer = #customer AND (l.OID = so.Location OR so.Location is null)
I did like Matt said, i moved the sub-query into the FROM section, i included ProductSize and Location in the select query of the derived table, then linking the result with "Size" table and i finally added a condition to the where section to eliminate the repetition of the same record for each Location.

Answer 1

I managed to build the query and it looks like this:
SELECT p.ArtNbr AS [Number],
p.Name AS Name,
s.SizeName AS Sizes,
s.SizeIndex AS SizeIndex,
s.Oid AS SizeId,
l.Name AS LocationName,
so.qty AS Quantity
FROM ([Size] AS s
INNER JOIN (Product AS p
INNER JOIN (Favorite AS f
INNER JOIN Location AS l
ON f.Customer = l.Customer) ON p.OID = f.Product)
ON p.OID = s.Product)
LEFT JOIN
(SELECT od.ProductSize AS PS,
od.Quantity AS qty,
o.Location as Location
FROM OrderDetails AS od INNER JOIN [Order] AS o ON od.Order = o.OID
WHERE o.Active = -1) AS so ON so.PS = s.OID
WHERE f.Customer = #customer AND (l.OID = so.Location OR so.Location is null)
I did like Matt said, i moved the sub-query into the FROM section, i included ProductSize and Location in the select query of the derived table, then linking the result with "Size" table and i finally added a condition to the where section to eliminate the repetition of the same record for each Location.