/* Formatted on 2011/11/26 11:42 (Formatter Plus v4.8.8) */
DECLARE
   row_id       PLS_INTEGER;
   v_batch_id   temp.batch_id%TYPE;
   v_slab_id    temp.slab_id%TYPE;
   flag         NUMBER (2);
   num PLS_INTEGER := &row_id;
   CURSOR c1
   IS
      SELECT batch_id, slab_id
        FROM temp;
BEGIN
   OPEN c1;

   LOOP
      FETCH c1
       INTO v_batch_id, v_slab_id;

      DBMS_OUTPUT.put_line (v_batch_id || ' ' || v_slab_id || flag);
      flag := 1;
      EXIT WHEN c1%ROWCOUNT > (num-1);
   END LOOP;

   CLOSE c1;
END;