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 c.music_name
from follow a ,music_likes b,music c
where a.user_id=1 and a.follower_id=b.user_id and b.music_id=c.id
and b.music_id not in(select music_id from music_likes where user_id=1)
order by c.id
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