Get the row_number() when running_total reach some amount

Question

how to Get the row_number() when running_total reach some amount?

Answer 1

Please take the words of RP very seriously and follow it everytime you post any question.
I'm not sure if you are asking for something like this:
ranit@XE11GR2>> with xx as
  2  (
  3     select 'a' name, 1000 sal from dual UNION ALL
  4     select 'b' name, 1500 sal from dual UNION ALL
  5     select 'c' name, 2000 sal from dual UNION ALL
  6     select 'd' name, 1500 sal from dual UNION ALL
  7     select 'e' name, 3000 sal from dual
  8  )
  9  --
10  -- "test data"
11  --
12  ,
13  x1 as
14  (
15   select
16     name, sal, SUM(sal) OVER(order by name) sm, ROW_NUMBER() OVER(order by name) rn
17   from xx
18  )
19  --
20  -- "calculated the SUM and assigned them a ROW_NUMBER"
21  --
22  select
23     name
24     , sal
25     , sm
26     , rn
27  from x1
28  where
29   sm=6000 -- "filtering based on some final amount (assumed:6000)"
30  /
N        SAL         SM         RN
d       1500       6000          4