Support for OUTPUT Parameters of Stored Procedures

[abbgrade]

Return data using an output parameter requires currently a workaround like

Invoke-TSqlCommand -Query @"
DECLARE @SalesYTDBySalesPerson money;

EXECUTE Sales.uspGetEmployeeSalesYTD  
    N'Blythe', @SalesYTD = @SalesYTDBySalesPerson OUTPUT;  

SELECT @SalesYTDBySalesPerson AS SalesYTDBySalesPerson;  
"