CREATE TABLE TEMP_UNPIVOT
(
  PLEDGE_NUMBER  VARCHAR2(30 BYTE),
  M1             NUMBER,
  F1             NUMBER,
  M2             NUMBER,
  F2             NUMBER
)

Insert into TEMP_UNPIVOT
   (PLEDGE_NUMBER, M1, F1, M2, F2)
 Values
   ('99999', 100, 3000, 200, 2000);
COMMIT;

The output I want is:

PLEDGE_NUMBER     M1    F1
99999             100   3000
99999             200   2000

Tried this:

select *
   from temp_unpivot
  unpivot (temp_name for temp_column in (m2, f2))

select *
  from (select * from temp_unpivot)
    unpivot((M1x, F1x) for pn in ((M1, F1) as 1,
                                  (M2, F2) as 2))
    order by 1, 2;

SQL> with lines as (select level line from dual connect by level <= 2)
  2  select PLEDGE_NUMBER,
  3         decode(line, 1, m1, 2, m2) mx,
  4         decode(line, 1, f1, 2, f2) fx
  5  from lines left outer join temp_unpivot partition by (PLEDGE_NUMBER) on 1=1
  6  /
PLEDGE_NUMBER                          MX         FX
------------------------------ ---------- ----------
99999                                 100       3000
99999                                 200       2000

2 rows selected.