How to calculate the running total of a column in SQL Server 2008 R2? - sql-server-2008-r2

Question

I was trying to calculate the cumulative sum of a column in SQL Server 2008 R2 after sorting the column in ascending order. I cannot use rows unbounded preceding or following as it is only available for SQL Server 2012 and beyond. I used the following code :
select
sub_code,
Roll_no,
Total_marks,
sum (Total_marks) over (order by Total_marks ASC) as cumulative_Total
from table
But I get an error:
Incorrect syntax near 'order'
How to resolve this?

Answer 1

One option which doesn't use a window function would be to use a correlated subquery to calculate the running total:
select
t1.sub_code,
t1.Roll_no,
t1.Total_marks,
(select sum(Total_marks) from table t2
where t2.Total_marks <= t1.Total_marks) as cumulative_Total
from table t1
order by t1.Total_marks
This assumes that you really want to order the running total using the thing you are trying to sum, namely Total_marks. In general, you could use the following correlated subquery if you intend to use a different column for ordering:
(select sum(Total_marks) from table t2
where t2.some_col <= t1.some_col) as cumulative_Total

Answer 2

Check out Aaron Bertrand's excellent answer with multiple options including pros and cons.
https://stackoverflow.com/a/11313533/3266499

Answer 3

I managed to solve this issue by using a stored procedure which arranges the scores range in ascending order and displays number of student per range value after which it calculates the cumulative score .
USE [databasename]
GO
/****** Object: StoredProcedure [dbo].[sp_range] Script Date: 8/26/2019 12:30:10
PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[sp_range]
#sub_code nvarchar(10)
AS
SET NOCOUNT ON;
;WITH data AS
(
SELECT CASE
WHEN Total_marks BETWEEN 10 and 20 THEN '10-20'
WHEN Total_marks BETWEEN 21 and 30 THEN '21-30'
WHEN Total_marks BETWEEN 31 and 40 THEN '31-40'
WHEN Total_marks BETWEEN 41 and 50 THEN '41-50'
WHEN Total_marks BETWEEN 51 and 60 THEN '51-60'
WHEN Total_marks BETWEEN 61 and 70 THEN '61-70'
WHEN Total_marks BETWEEN 71 and 80 THEN '71-80'
WHEN Total_marks BETWEEN 81 and 90 THEN '81-90'
WHEN Total_marks BETWEEN 91 and 100 THEN '91-100'
end as Score_Acheived,
No_of_Students=COUNT(1)
from tablename
where sub_code=#sub_code
GROUP BY
(
CASE
WHEN Total_marks BETWEEN 10 and 20 THEN '10-20'
WHEN Total_marks BETWEEN 21 and 30 THEN '21-30'
WHEN Total_marks BETWEEN 31 and 40 THEN '31-40'
WHEN Total_marks BETWEEN 41 and 50 THEN '41-50'
WHEN Total_marks BETWEEN 51 and 60 THEN '51-60'
WHEN Total_marks BETWEEN 61 and 70 THEN '61-70'
WHEN Total_marks BETWEEN 71 and 80 THEN '71-80'
WHEN Total_marks BETWEEN 81 and 90 THEN '81-90'
WHEN Total_marks BETWEEN 91 and 100 THEN '91-100' end
)
)
SELECT
d.Score_Acheived,
d.No_of_Students,
Accumulate_Total_Score = SUM(d2.No_of_Students)
FROM
data d
INNER JOIN
data AS d2 ON d.Score_Acheived >= d2.Score_Acheived
GROUP BY
d.Score_Acheived,
d.No_of_Students
ORDER BY
d.Score_Acheived;