select 
      music_name 
from follow f inner join music_likes m
on f.follower_id = m.user_id
inner join music mc on m.music_id = mc.id
where f.user_id = 1
and not exists(select 1 from music_likes ms where ms.user_id=1 and ms.music_id = m.music_id)
group by music_id,music_name
order by music_id

提出user_id=1 喜欢的music