Oracle PL/SQL Format Output

Output '\t' in dbms_output package!
Use Oracle character function to replace the '\t' and other special characters!

declare
  t1 INTEGER;
  t2 INTEGER;
  stmt VARCHAR2(2048);
begin
  for t in (select tname from tab) loop
    stmt := 'select count(*) from ' || t.tname;
    execute immediate stmt into t1;

    stmt := 'select count(*) from SYSTEM.' || t.tname;
    execute immediate stmt into t2;

    if t1 != t2 then
      stmt := chr(9) || 'Different! ';
    else
      stmt := chr(9) || ' ';
    end if;

    dbms_output.put_line(RPAD(t.tname, 34, ' ')
        || chr(9) || to_char(t1) || chr(9) || to_char(t2)
        || stmt);
  end loop;
end;