Step in for loop

Question

Hi all,
Is it possible in a for loop to iterate with steps ? For example :
for i in 1..500 loop , but I want the index i to grow five by five ! Is it possible ? Is there a keyword to use to accomplish this ? My database is Oracle10g !
Thank you !

Answer 1

Directly you can't control the iterator of FOR LOOP (no change possible, no INCREMENT clause).
You can use another index to control iterations::
SQL> declare
  2   j integer := 1;
  3  begin
  4   for i in 1..5 loop
  5     j := i*5;
  6     dbms_output.put_line('i=' || i || ', j=' ||j);
  7   end loop;
  8  end;
  9  /
i=1, j=5
i=2, j=10
i=3, j=15
i=4, j=20
i=5, j=25
PL/SQL procedure successfully completed.
SQL> declare
  2   i integer := 1;
  3  begin
  4   while ( i < 25 ) loop
  5     dbms_output.put_line('i=' || i );
  6     i := i + 5;
  7   end loop;
  8  end;
  9  /
i=1
i=6
i=11
i=16
i=21
PL/SQL procedure successfully completed.
SQL>/* Just for fun */
SQL> begin
  2   for v in (select rownum*5 as i from (select 1 from dual connect by level<6)) loop
  3      dbms_output.put_line('i=' || v.i );
  4   end loop;
  5  end;
  6  /
i=5
i=10
i=15
i=20
i=25
PL/SQL procedure successfully completed.Rgds.