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 music_name from music where id in(
select distinct 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 ));
