Running Multiplication in T-SQL

Question

GTS Table

CCP months   QUART   YEARS  GTS
----  ------  -----    ----- ---
CCP1    1       1   2015    5
CCP1    2       1   2015    6
CCP1    3       1   2015         


        

Answer 1

No recursion, no loops.

DECLARE @BASELINE TABLE(CCP char(4),    BASELINE numeric(22,6),  YEARS  int ,QUART int)
DECLARE @gts TABLE (CCP char(4),months int,QUART int,YEARS int,GTS numeric(22,6))

insert into @baseline
    SELECT 'CCP1' AS CCP,5 AS BASELINE, 2015 AS YEARS,1 AS QUART 

insert into @gts (CCP,months,QUART,YEARS,GTS)
    SELECT 'CCP1' AS CCP,1 AS  months,1 AS QUART ,2015 AS YEARS,  5 AS GTS  UNION
    SELECT 'CCP1' AS CCP,2 AS  months,1 AS QUART ,2015 AS YEARS,  6 AS GTS  UNION
    SELECT 'CCP1' AS CCP,3 AS  months,1 AS QUART ,2015 AS YEARS,  7 AS GTS  UNION
    SELECT 'CCP1' AS CCP,4 AS  months,2 AS QUART ,2015 AS YEARS,  4 AS GTS  UNION
    SELECT 'CCP1' AS CCP,5 AS  months,2 AS QUART ,2015 AS YEARS,  2 AS GTS  UNION
    SELECT 'CCP1' AS CCP,6 AS  months,2 AS QUART ,2015 AS YEARS,  2 AS GTS  UNION
    SELECT 'CCP1' AS CCP,7 AS  months,3 AS QUART ,2015 AS YEARS,  3 AS GTS  UNION
    SELECT 'CCP1' AS CCP,8 AS  months,3 AS QUART ,2015 AS YEARS,  2 AS GTS  UNION
    SELECT 'CCP1' AS CCP,9 AS  months,3 AS QUART ,2015 AS YEARS,  1 AS GTS  UNION
    SELECT 'CCP1' AS CCP,10 AS  months,4 AS QUART ,2015 AS YEARS, 2  AS GTS  UNION
    SELECT 'CCP1' AS CCP,11 AS months,4 AS QUART ,2015 AS YEARS,  3 AS GTS  UNION
    SELECT 'CCP1' AS CCP,12 AS months,4 AS QUART ,2015 AS YEARS,  4 AS GTS 



DECLARE @Summary TABLE (CCP char(4),[DATE] DATE,SumGTS numeric(22,6),AllPriorGTS numeric(22,6),[Multiplier] numeric(22,6))
INSERT INTO @Summary(CCP,[DATE],SumGTS)
    SELECT
            CCP,DATEADD(MONTH,(QUART-1)*3,DATEADD(YEAR,YEARS-2000,'01/01/2000')) [DATE]
        ,   SUM(GTS) [SumGTS]
    FROM @gts
    GROUP BY CCP,DATEADD(MONTH,(QUART-1)*3,DATEADD(YEAR,YEARS-2000,'01/01/2000'))

UPDATE s
SET AllPriorGTS=
    (
        SELECT EXP(SUM(LOG(s1.SumGTS)))
        FROM @Summary s1
        WHERE s1.[Date]