please help me to correct my answer:
The Following tables from part of a database held in a relational Database Management System (DBMS).
Hotel (HotelNo, HotelName, City)
Room (RoomNo, HotelNo, TypeHotel, Price)
Booking (HotelNo, GuestNo, DateFrom, DateTo, RoomNo)
Guess (GuestNo, GuestName, GuestAddress)
Note: Underlined words is primary key
and the question Like this:
LIST THE ROOM THAT ARE CURRENTLY UNOCCUPIED at the HILLTON HOTEL.
and i answer like this:
SELECT Room.RoomNo, Room.TypeHotel FROM Room, Hotel, Booking, Guess Where Hotel.HotelName='Hillton' AND Booking.GuestNo=Guess.GuestNo and Guess.Guestno=null;
when i try to interpret this code with insert the value of table Hotel, Room, Booking and guess. but NO OUTPUT from my code.
there is something wrong with mySQL code ?