select music_name from follow f join music_likes m1 on f.follower_id = m1.user_id join music m2 on m1.music_id = m2.id where f.user_id = 1 and music_id not in ( select music_id from music_likes where user_id = 1 ) group by music_name,m1.music_id order by m1.music_id asc 三表联表然后在where条件中筛选出id=1的...