题解 | 网易云音乐推荐(网易校招笔试真题)
网易云音乐推荐(网易校招笔试真题)
https://www.nowcoder.com/practice/048ed413ac0e4cf4a774b906fc87e0e7
-- music表中应该是默认没有重复的歌曲，所以不用distinct也可以
select music_name
from music
where id in (
select music_id
from music_likes
where user_id in (
select follower_id
from follow
where user_id = 1
)
and music_id not in (
select music_id
from music_likes
where user_id = 1
)
)
order by id
