create global temporary table FF (x number)
       on commit preserve rows;

Table created.

create or replace procedure FrenchFry is
begin
    for x in (select salary from s_emp) loop
        insert into FF values (x.salary);
    end loop;
    commit;
end;
/

Procedure created.

execute FrenchFry

PL/SQL procedure successfully completed.

select * from ff;

         X
----------
      3000
      1450
      2000
      1450
      1550
      1200
      1250
      1100
      1300
      1307
      1400
      1490
      1515
      1525
      1450
      1400
       940
      1200
       795
       750
       850
       800
       795
       860
      1100

25 rows selected.