Running total for duplicate rows

Question

Hi,
I am trying to write an sql which shows the running total for records which has duplicate. Please share any idea to get this.
sample rows:
col1 col2 col3
1      A    2
1      A    2
1      A    2
1      B    3
1      B    3
1      C    5
1      D    2
1      D    2o/p required:
col1 col2 col3  cumulative_tot
1      A    2       2
1      A    2       2
1      A    2       2
1      B    3       5
1      B    3       5
1      C    5       10
1      D    2       12
1      D    2       12

Answer 1

Hi,
Try this:
WITH A AS
select 1 col1,  'A' col2, 2 col3  from dual union all
select 1 col1,  'A' col2, 2 col3  from dual union all
select 1 col1,  'A' col2, 2 col3  from dual union all
select 1 col1,  'B' col2, 3 col3  from dual union all
select 1 col1,  'B' col2, 3 col3  from dual union all
select 1 col1,  'C' col2, 5 col3  from dual union all
select 1 col1,  'D' col2, 2 col3  from dual union all
select 1 col1,  'D' col2, 2 col3  from dual
,B AS
SELECT
  A.*
  ,ROW_NUMBER() OVER (PARTITION BY COL1, COL2 ORDER BY 1) RN
FROM
  A
SELECT
  B.*
  ,SUM(CASE WHEN RN = 1 THEN COL3 ELSE 0 END) OVER ( ORDER BY COL1, COL2 ,RN ) cumulative_tot
FROM
  B
COL1 COL2 COL3 RN CUMULATIVE_TOT
   1 A       2  1              2
   1 A       2  2              2
   1 A       2  3              2
   1 B       3  1              5
   1 B       3  2              5
   1 C       5  1             10
   1 D       2  1             12
   1 D       2  2             12
8 rows selected Regards,
Peter