Getting a value from stored procedure within a stored procedure - tsql

Question

I have a stored procedure which returns an XML file. At the moment some calculations are done in XSL but I would like to do these within the database using another stored procedure. (adding the result of that calculation to the XML)
ALTER PROCEDURE [dbo].[app_Get_Phone_And_Tariffs]
-- Add the parameters for the stored procedure here
#phone nvarchar(150)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- Insert statements for procedure here
SELECT
PB.UID as '#phoneid',
PB.Short_Title as '#title',
PB.Description as '#desc',
PB.Camera as '#camera',
PB.Storage as '#storage',
PB.Screen_Size as '#screensize',
PB.OS as '#os',
PB.Processor as '#chip',
PB.Image1 as '#image',
PB.Trade_Price as '#tradeprice',
(SELECT
TB.UID as '#tariffid',
TB.Tariff_Name as '#name',
TB.Carrier as '#network',
TB.Inclusive_Minutes as '#mins',
TB.Inclusive_Texts as '#texts',
TB.Inclusive_Data as '#data',
TB.Monthly_Cost as '#monthly',
TB.Commission as '#comm',
(TB.Commission - PB.Trade_Price) as '#upfront'
FROM dbo.Tariff_Base TB
WHERE TB.Active = 1 AND TB.Type = 1
FOR XML PATH('tariff'), TYPE
),
(SELECT
OP.GP_Margin as '#gpmargin'
FROM dbo.Options OP
FOR XML PATH('options'), TYPE
)
FROM dbo.Phone_Base PB
WHERE PB.Friendly_URL_Name = #phone AND PB.Active = 1
FOR XML PATH('detail'), TYPE
END
What I want to do is:
In the inner select (TB) is to call another SP lets call it "calculate" passing 2 variables (TB.Commission and PB.Trade_Price) for the sum
Calculate will return a value i.e. #hp to the stored procedure which can be added/used in the XML List.
Can this be done in SQL Server 2014/T-SQL?

Answer 1

No. But you could do it with a function. See the MSDN documentation, especially example A.
Something like this (untested):
CREATE FUNCTION dbo.Calculate (#Comission float, #TradePrice float)
RETURNS float
WITH EXECUTE AS CALLER
AS
BEGIN
DECLARE #SumVal float;
SET #SumVal = #Commission + # TradeValue;
RETURN(#SumVal);
END;
GO
--In your sub-query
SELECT values, dbo.Calculate(TB.Commission, PB.Trade_Price) AS A_Sum
FROM ...;