At most one record can return by sub query in MS Access

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Hi, I need to arrive Remaining Stock from products. I have 3 Tables Product, Sold, ReceivedProducts

ProductStock Table

C#

ProductId   ProductName  InitialQuantity
1           Mobile       50
2           Charger      30
3           Torch Light  50
4           Laptop       40

ReceivedProducts Table

C#

Product(Product Id)    ReceivedQty
2                      20
2                      5

Sold Table

C#

ItemId   Quantity   Amount
4         3         90,000
1         10        5,000

Now i need to get remaining Stock that is ((Initial Qty + Received Qty) - Sold Qty )
so i tried this query to join initial qty and Received Qty but getting error like At most one record can return by sub query

SQL

SELECT ProductId, InitialStock, 
(SELECT ReceivedQty FROM ReceivedProducts WHERE Product=ProductStock.ProductId) AS ReceivedStock FROM ProductStock;

this below query working but getting only one product because received product is twice same so. I need to add initial stock if received quantity is not available also. How to form query ??
(Initial Qty + Received Qty)

SQL

SELECT ProductId, 
InitialStock+SUM(ReceivedQty) AS TotalQty 
FROM ProductStock AS PSD INNER JOIN ReceivedProducts AS RP ON PSD.ProductId=RP.Product
GROUP BY PSD.ProductId,InitialStock;

Help me to solve this

Thanks in advance
Sri

Posted 2-Apr-14 19:33pm

srihari1904

Updated 2-Apr-14 22:14pm

v4

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Andrius Leonavicius · Accepted Answer · 2014-04-03T00:01:00

Hi,

You're getting only one product because you're using INNER JOIN. So use LEFT JOIN instead. Also, you need to replace NULL values with 0. Your query should be like this:

SQL

SELECT ProductId, IIF(InitialStock IS NULL, 0, InitialStock) + SUM(IIF(ReceivedQty IS NULL, 0, ReceivedQty)) AS TotalQty
FROM ProductStock AS PSD LEFT JOIN ReceivedProducts AS RP ON PSD.ProductId = RP.Product
GROUP BY PSD.ProductId, InitialStock;

Please let me know how it works.