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)
http://www.nowcoder.com/practice/048ed413ac0e4cf4a774b906fc87e0e7
select distinct music_name
from music m
where m.id in (
select music_id
from music_likes
where user_id in
(
select f.follower_id
from follow f
where f.user_id = 1
) and
music_id not in
(
select music_id
from music_likes
where user_id = 1
)
order by music_id
);
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