SQL:许多解决方案和交叉实体。

With a many to many relationship, an intersection table is used to resolve this to two one-to-many relationships. My problem here is that I currently have 2 tables, "Playlist" and "song". Each song be present in many playlists, and each playlist can contain many songs. To resolve this add a third table, "songlog" to resolve the many to many. With a many to many relationship, an intersecti