Программа для поиска и оценки книг, что-то похожее на кинопоиск, только для книг
Code from diagram:
Users
id_user PK int name string email string login varchar birthday timestamp
Books
id_book PK int name varchar description varchar release_date timestamp volume int rate int
Books_genres
id_book int FK >- Books.id_book id_genre int FK >- Genres.id_genre
Genres
id_genre PK int name_genre string
Likes
id_user int FK >- Users.id_user id_book int FK >- Books.id_book
Users_friend
id_user_one int FK >- Users.id_user id_user_two int FK >- Users.id_user
Book_author
id_book int FK >- Books.id_book id_author int FK >- Authors.id_author
Authors
id_author PK int name varchar