how about..

select sProduct_CD,dbo.udfGetInventoryOnHand(sProduct_CD) AS QuantityOnHand
from
(SELECT i.sProduct_CD
FROM Inventory i
JOIN Product p ON p.sProduct_CD = i.sProduct_CD
WHERE i.decInv_Physical_Qty <> 0 OR p.sCommodity_CD <> 'M') as temp
where QuantityOnHand > 0


>Ok, here's what I have. The function returns 0 (for now).
>
>
>

>
>SELECT i.sProduct_CD, dbo.udfGetInventoryOnHand(i.sProduct_CD) AS QuantityOnHand
>	FROM Inventory i
>	JOIN Product p ON p.sProduct_CD = i.sProduct_CD
>	WHERE i.decInv_Physical_Qty <> 0 OR
>		  (QuantityOnHand > 0 and p.sCommodity_CD <> 'M')
>
>

>
>I'm getting "Invalid column name 'QuantityOnHand'" on the last line. I'm guessing I'm referencing it wrong. Clue me in please.
>
>
>
>
>
>
>>>>>What's the correct syntax for calling this SP for each row to be returned?
>>>>>
>>>>>

>>>>>
>>>>>DECLARE @iInventoryOnHand INT
>>>>>
>>>>>-- I want to call this proc for each record
>>>>>EXEC spGetInventoryOnHand @sProdCode, @iInventoryOnHand OUTPUT
>>>>>
>>>>>SELECT i.sProduct_CD, <<call SP here>>
>>>>>	FROM Inventory i
>>>>>	JOIN Product p ON p.sProduct_CD = i.sProduct_CD
>>>>>	WHERE i.decInv_Physical_Qty <> 0 OR
>>>>>		  (@iInventoryOnHand > 0 and p.sCommodity_CD <> 'M')
>>>>>
>>>>>

>>>>
>>>>It sounds like you should be using a function instead of an SP..
>>>>
>>>>SELECT i.sProduct_CD, dbo.funcInvOnHand(p.sProdCode) as InventoryOnHand
>>>> FROM Inventory i
>>>> JOIN Product p ON p.sProduct_CD = i.sProduct_CD
>>>> WHERE i.decInv_Physical_Qty <> 0 OR
>>>> (@iInventoryOnHand > 0 and p.sCommodity_CD <> 'M')
>>>>
>>>>and create the FuncInvOnHand to return the number
>>>
>>>
>>>Ok, I've never done a UDF. Anything different than a sproc?
>>
>>Look up Create Function in BOL. They are pretty straightforward. Normally you create a scalar function (true in your case) although you can also return a table.
>>
>>The biggest difference between SP and function is that you have to declare the return type and actually RETURN it at the end.