我正在为一个查询而苦苦挣扎。
我有两张桌子:
CREATE TABLE Playlist(
id INTEGER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
name VARCHAR(255) NOT NULL,
);
CREATE TABLE PlaylistMovies(
mid INTEGER FOREIGN KEY REFERENCES Movie(movieid) ON DELETE CASCADE,
pid INTEGER FOREIGN KEY REFERENCES Playlist(id) ON DELETE CASCADE,
PRIMARY KEY (mid, pid)
);
我想找到电影最多的播放列表(计算中)。
如何解决这个问题?