题解 | #网易云音乐推荐(网易校招笔试真题)#

这一定是好理解的，也是失败的代码，运行巨大，称呼我为后台杀手 select music_name from ( select distinct music_name,l.music_id from ( select user_id,f.follower_id,t.music_id from follow f left join ( select follower_id,music_id from music_likes m right join follow f on f.follower_id=m.user_id )t on t.follower_id=f.follower_id where user_id=1 and (user_id,t.music_id) not in (select user_id,music_id from music_likes where user_id =1 )

)l left join music c on c.id=l.music_id order by l.music_id )z

我是sb