Dynamic parameters example

PreparedStatement ps2 = conn.prepareStatement(
    "UPDATE HotelAvailability SET rooms_available = " +
    "(rooms_available - ?) WHERE hotel_id = ? " +
    "AND booking_date BETWEEN ? AND ?");
-- this sample code sets the values of dynamic parameters
-- to be the values of program variables
ps2.setInt(1, numberRooms);
ps2.setInt(2, theHotel.hotelId);
ps2.setDate(3, arrival);
ps2.setDate(4, departure);
updateCount = ps2.executeUpdate();