题解 | #推荐内容准确的用户平均评分#
推荐内容准确的用户平均评分
https://www.nowcoder.com/practice/2dcac73b647247f0aef0b261ed76b47e
select
round(avg(score), 3) avg_score
from
user_action_tb
where
(user_id, hobby_l) in (
select
rec_user user_id,
rec_info_l hobby_l
from
recommend_tb
)
