Calculation in Sql Server

Question

I trying to perform following calculation

Sample data:

CREATE TABLE #Table1
  (
     rno   int identity(1,1),
     ccp   varchar(50),
          


        

Answer 1

Try this:

;with 
    val as (
        select 
            *, 
            (1 + col2 / 100.00) val,
            row_number() over(partition by ccp order by rno desc) rn
        from #Table1),
res as (
        select 
            v1.rno, 
            --min(v1.ccp) ccp,
            --min(v1.col1) col1, 
            --min(v1.col2) col2, 
            min(v1.col3) col3, 
            sum(v2.col1 * power(v2.val, 1 + v2.rn - v1.rn)) sum_val
        from val v1
        left join val v2 on v2.ccp = v1.ccp and v2.rno <= v1.rno
        group by v1.rno)
select *, col3 - isnull(sum_val, 0)
from res

But performance depends on indexes. Post index structure for details. Best performance can be achieved when you will split it into more temporary tables.