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
select music_name from (select distinct id,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))) m order by id; 比较有趣的是还要筛选掉用户本人喜欢的音乐,拆开一个个条件后,再组装到一起。比较喜欢In后面那个子查询。
