Database Fundamentals (8 of 10) - Many-to-many Relationships in a Data Model - Смотреть видео или скачать видео в MP4, музыку MP3 на телефон или компьютер
A logical data model may show many-to-many relationships but these cannot be built in the relational database. The physical data model decomposes the many-to-many relationship into at least two one-to-many relationships. This video gives examples of this.