Need to calculate running balance of debit

Question

I am working for 1 accounts project and i have stuck in 1 place.

Table is debit

ID      Debit       Credit      A       B       C   
1       1000.00     900.00      0       0       1000.00     
2       450.00      425.00      0       450.00  0   
3       500.00      490.00      500.00  0       0   
4       600.00      599.00      600.00  0       0   
5       748.00      700.00      0       748.00  0   


Now if we sum the credit it will be = 3114,  
What I have to do here is whatever total credit I have it has to start from top (A+B+C) - 3114  
So It will make C = 0 and my new credit will be 3114-1000=2114,   
Then in my id=2 it will do the same thing (A+B+C) - 2114  
so now B will be 0 and my new credit will be 2114-450=1664

My end output after all the calculation it should be

ID      Debit       Credit      A       B       C   
1       1000.00     900.00      0       0       0.00        
2       450.00      425.00      0       0.00    0   
3       500.00      490.00      0.00    0       0   
4       600.00      599.00      0.00    0       0   
5       748.00      700.00      0       184.00  0   

If we try to (sum A + Sum B + Sum C) - credit, figure will be the same but it will come in column A, So after all the brainstorming I think above calculation has to be applied.

Do anyone has any idea how to achieve this.

Any help would be appreciated.

Answer 1

SQL Server only support analytics function SUM() OVER from version MSSQL 2012, so for 2008 this may be one way to query your result:

WITH table_name AS
( 
    SELECT 1 ID, 000.00 Debit, 900.00 Credit, 0       a, 0       b, 1000.00     c UNION ALL
    SELECT 2 ID, 450.00 Debit, 425.00 Credit, 0       a, 450.00  b, 0   c UNION ALL
    SELECT 3 ID, 500.00 Debit, 490.00 Credit, 500.00  a, 0       b, 0   c UNION ALL
    SELECT 4 ID, 600.00 Debit, 599.00 Credit, 600.00  a, 0       b, 0   c UNION ALL
    SELECT 5 ID, 748.00 Debit, 700.00 Credit, 0       a, 748.00  b, 0   c 
)
, 
sum_credit AS
(
    SELECT SUM(credit) sumcredit 
    FROM table_name
)
SELECT t.id, t.debit, t.credit, 
    CASE WHEN a = 0
            OR ( (SELECT COALESCE(SUM(a + b + c), 0) FROM table_name WHERE id < t.id)
                + a - sc.sumcredit < 0
            )
        THEN 0 
        ELSE (SELECT COALESCE(SUM(a + b + c), 0) FROM table_name WHERE id < t.id)
            + a - sc.sumcredit 
        END a,
    CASE WHEN b = 0
            OR ( (SELECT COALESCE(SUM(a + b + c), 0) FROM table_name WHERE id < t.id)
                + a + b - sc.sumcredit < 0
            )
        THEN 0 
        ELSE (SELECT COALESCE(SUM(a + b + c), 0) FROM table_name WHERE id < t.id)
            + a + b - sc.sumcredit 
        END b,
    CASE WHEN c = 0 
            OR ( (SELECT COALESCE(SUM(a + b + c), 0) FROM table_name WHERE id < t.id)
                + a + b + c - sc.sumcredit < 0
            )
        THEN 0 
        ELSE (SELECT COALESCE(SUM(a + b + c), 0) FROM table_name WHERE id < t.id)
            + a + b + c - sc.sumcredit 
        END c
FROM 
    table_name t
CROSS JOIN 
    sum_credit sc;