Calculate wrong amount in query - sql

Question

I have a table with some records now want to repeat this table content with some logic. I have two date start date and termination date, means record start from start_date and end on termination date, it will working fine but problem is calculate amount on it,
Logic is amount calculation formula
basesalary / 12 * ( SUTARate / 100 ) * ( x.num+1)
if this amount is less than SUTAMaximumAmount this amount is used, else 0. And one more thing if amount will be remain and year is complete then restart calculation from next year.. x.num is temporary table which hold 90 number from 1 to 90
Table
BaseSalary| S_Date | T_Date | SUTARate| SUTAMaximumAmount |A_S_Percent
48000 | 7-1-2013 | 3-15-2015 | 1.1 | 300 | 5
My result is
DAte amount
2013-07-01 00:00:00.000 44
2013-08-01 00:00:00.000 44
2013-09-01 00:00:00.000 44
2013-10-01 00:00:00.000 44
2013-11-01 00:00:00.000 44
2013-12-01 00:00:00.000 44
2014-01-01 00:00:00.000 36
2014-02-01 00:00:00.000 -8
2014-03-01 00:00:00.000 -52
2014-04-01 00:00:00.000 -96
2014-05-01 00:00:00.000 -140
2014-06-01 00:00:00.000 -184
2014-07-01 00:00:00.000 -228
2014-08-01 00:00:00.000 -272
2014-09-01 00:00:00.000 -316
2014-10-01 00:00:00.000 -360
2014-11-01 00:00:00.000 -404
2014-12-01 00:00:00.000 -448
2015-01-01 00:00:00.000 -492
2015-02-01 00:00:00.000 -536
2015-03-01 00:00:00.000 -580
and I want result like this
Date | Amount
7-1-2013 44
8-1-2013 44
9-1-2013 44
10-1-2013 44
11-1-2013 44
12-1-2013 44
1-1-2014 44
2-1-2014 44
3-1-2014 44
4-1-2014 44
5-1-2014 44
6-1-2014 44
7-1-2014 36
1-1-2015 44
2-1-2015 44
3-1-2015 44
Query
SELECT dateadd(M, (x.num),d.StartDate) AS TheDate,
Round( case when ((convert(float,d.SUTARate)/100* convert(integer,d.BaseSalary) / 12)*(x.num+1)) <=CONVERT(money,d.SUTAMaximumAmount)
then (convert(float,d.SUTARate)/100* convert(integer,d.BaseSalary)* / 12)
else (CONVERT(money,d.SUTAMaximumAmount)-((convert(float,d.SUTARate)/100* (convert(integer,d.BaseSalary) / 12)*x.num)))*Power((1+convert(float,d.AnnualSalaryIncreasePercent)/100),Convert(int,x.num/12)) end, 2) AS Amount,
FROM #Table AS x, myTbl AS d
WHERE (x.num >= 0) AND (x.num <= (DateDiff(M, d.StartDate, d.TerminationDate)) )
temporary table
create TABLE #Table (
num int NOT NULL,
);
;WITH Nbrs ( n ) AS (
SELECT 0 UNION ALL
SELECT 1 + n FROM Nbrs WHERE n < 99 )
INSERT #Table(num)
SELECT n FROM Nbrs
OPTION ( MAXRECURSION 99 )
this table used as x in above query

Answer 1

I created this SQLFiddle.
-- Numbers table is probably a good idea
WITH Nbrs ( num ) AS
(
SELECT 0 UNION ALL
SELECT 1 + num FROM Nbrs WHERE num < 99
)
-- All columns, except for 'num' come from myTbl
SELECT dateadd(M, (num),S_Date) AS TheDate,
Round(
CASE
WHEN (SUTARate / 100) * (BaseSalary / 12) <= SUTAMaximumAmount
THEN (SUTARate / 100) * (BaseSalary / 12)
ELSE 0
END
, 2) As Amount
-- This may be the number you were trying to multiply
,DatePart(Month, dateadd(M, (num),S_Date)) As PotentialMultiiplier
FROM Nbrs AS x, myTbl AS d
WHERE (num >= 0)
AND (num <= (DateDiff(M, S_Date, T_Date)) )
I am not entirely sure what your goal is, but you are probably on the right track with a numbers table. Because the result you are going for does not change much over time (i.e., nearly every month has an amount of $44), it is difficult to determine the correct code for the query. So, I recommend you provide a different set of data for better result-checking.
If you fiddle with the SQL in the provided link, you can re-post with better code, and then we can better solve your issue.