mysql - 选择半径内平均评分最高的评论

Question

我试图通过平均评论评级列来获得半径内平均评级最高的主题。

我已经尝试了一些类似的东西：

select avg(`rating`) AS `avgrate` , subject.*,
, ( 3959 * acos( cos( radians(22.28639) ) * cos( radians( lat ) ) * cos( radians( subject.long ) - radians(114.1491) ) + sin( radians(22.28639) ) * sin( radians( lat ) ) ) )
AS distance 
from `subject_review` 
JOIN `subject`
ON subject_review.subject_id = subject.id
group by `subject_id`
HAVING distance <= 100 
order by `avgrate` DESC
LIMIT 10

这个 SQL 工作正常，我只需要添加半径过滤器，

select avg(`rating`) AS `avgrate` ,subject_review.id , subject.*
from `subject_review` 
JOIN `subject`
ON subject_review.subject_id = subject.id
group by `subject_id`
order by `avgrate` DESC
LIMIT 10