In SQL Server 2008 you can use
http://www.sommarskog.se/share_data.html#tableparam
or else simple and same as common execution
CREATE PROCEDURE OrderSummary @MaxQuantity INT OUTPUT AS
SELECT Ord.EmployeeID, SummSales = SUM(OrDet.UnitPrice * OrDet.Quantity)
FROM Orders AS Ord
JOIN [Order Details] AS OrDet ON (Ord.OrderID = OrDet.OrderID)
GROUP BY Ord.EmployeeID
ORDER BY Ord.EmployeeID
SELECT @MaxQuantity = MAX(Quantity) FROM [Order Details]
RETURN (SELECT SUM(Quantity) FROM [Order Details])
GO
I hopes its help to you