cretaceous;10999268 wrote:ok, so I'm easily offended, dearie..
(anyway now I know what ERD is)
you might want to work on the idea of another entity (table) for the "show"
that way the "show" could contain two or more movies and adverts as well - it's one level more complex but more flexible
i'm happy for your response
yes , i will create new entity (showtime)contain (Date,start-time,end-time),and then inherit the primary key of movie(movie_id)also the primayy key of cinemaHall(hall_No),it complex but more flexible as u said,