//String insert_db = "DELETE from actor WHERE actor_id = 202";
    //st.executeUpdate(insert_db);

    ResultSet rs1 = st.executeQuery("SELECT * from actor WHERE actor_id < 20");
    while(rs1.next());{
        System.out.println(rs1.getString("first_name"));
    }

    }catch(Exception e){
        //JOptionPane.showMessageDialog(null, e.getMessage());
        System.out.println(e.getMessage());
    }