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 distinct round(avg(score)over(), 3) as avg_score
from recommend_tb r
join user_action_tb u
on r.rec_user = u.user_id
where r.rec_info_l = u.hobby_l
group by r.rec_info_l, r.rec_user;
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