Increment loop in the 12 th iteration

Question

Hi Guys,
How to do this....
For the First 11 Iteration do not increment my counter,after then increment the counter by 1 in the 12 th Iteration..then do not increment the counter upto the 23 rd iteration then on the 24 th iteration icrement by 1...goes on....how to do this.
Example.....
31-MAR-2001 ....c = 1
31-MAR-2002 ... c = 2
31-MAR-2003 ... C = 3
etc.....
exit the loop when 31-mar-2006 comes...
How to do this.plz help..
Gita

Answer 1

I suspect this is not the wanted o/p.Then pls give a clear sample o/p
sql>select * from t;
DT SNO 
31-MAR-01  1 
31-MAR-02  2 
31-MAR-03  3 
31-MAR-04  4 
31-MAR-05  5 
sql>
declare
n number;
begin
select count(*)
into n
from t;
for i in 1..n loop
  for rec1 in (select dt,sno,nvl(lead(dt) over(order by sno),add_months(dt,12)) dt1 from t)   loop
    dbms_output.put_line(rec1.dt||' to '||rec1.dt1||' '||'yr='||rec1.sno) ;
  end loop;
end loop;
end;
31-MAR-01 to 31-MAR-02 yr=1
31-MAR-02 to 31-MAR-03 yr=2
31-MAR-03 to 31-MAR-04 yr=3
31-MAR-04 to 31-MAR-05 yr=4
31-MAR-05 to 31-MAR-06 yr=5
31-MAR-01 to 31-MAR-02 yr=1
31-MAR-02 to 31-MAR-03 yr=2
31-MAR-03 to 31-MAR-04 yr=3
31-MAR-04 to 31-MAR-05 yr=4
31-MAR-05 to 31-MAR-06 yr=5
31-MAR-01 to 31-MAR-02 yr=1
31-MAR-02 to 31-MAR-03 yr=2
31-MAR-03 to 31-MAR-04 yr=3
31-MAR-04 to 31-MAR-05 yr=4
31-MAR-05 to 31-MAR-06 yr=5
31-MAR-01 to 31-MAR-02 yr=1
31-MAR-02 to 31-MAR-03 yr=2
31-MAR-03 to 31-MAR-04 yr=3
31-MAR-04 to 31-MAR-05 yr=4
31-MAR-05 to 31-MAR-06 yr=5
31-MAR-01 to 31-MAR-02 yr=1
31-MAR-02 to 31-MAR-03 yr=2
31-MAR-03 to 31-MAR-04 yr=3
31-MAR-04 to 31-MAR-05 yr=4
31-MAR-05 to 31-MAR-06 yr=5
PL/SQL procedure successfully completed.