Question

Supose I have data in below format

FIELD1   F2       F3 
LIN0_TMP    A0  1
LIN0_TMP    B0  2
LIN0_TMP    C0  3
LIN_TMP     A   1
LIN_TMP     B   2
LIN_TMP     C   3
LIN_TMP     D   4
LIN2_TMP    A2  1
LIN2_TMP    B2  2
LIN2_TMP    C2  3
LIN2_TMP    D2  4

i WANT output in below format using oracle sql query.

FIELD1   F2       F3   FLOW
    LIN0_TMP    A0  1 FLOW1
    LIN0_TMP    B0  2 FLOW1
    LIN0_TMP    C0  3 FLOW1
    LIN_TMP     A   1 FLOW2
    LIN_TMP     B   2 FLOW2
    LIN_TMP     C   3 FLOW2
    LIN_TMP     D   4 FLOW2
    LIN2_TMP    A2  1 FLOW3 
    LIN2_TMP    B2  2 FLOW3
    LIN2_TMP    C2  3 FLOW3
    LIN2_TMP    D2  4 FLOW3

Number of record for field1 is not fixed for each LIN_TMP value..

Answer 1

This solution uses an analytic sum to generate a running total of the number of times F3 = 1.

select field1
      , f2
      , f3
      , 'FLOW'||trim(to_char(rnk))
from 
     (select field1
      , f2
      , f3
      , sum(case when f3 = 1 then 1 else 0 end)
     over (order by field1, f3 range between unbounded preceding and current row) rnk
    from your_table )

Here is the SQL Fiddle.

As I mentioned in my comment, your sort order for FIELD1 is wack, so you will need to supply your own ORDER BY column for the window clause.