Question

我有2张表comments | votes

the `votes` structure 
[`id` | `user_id` | `comment_id`  | `rating`]

并且评论将comment_id作为主要的确定？现在我想根据评级总和获得最高评价

[评分为0或1]

我也希望得到顶级用户

Answer 1

热门评论

这假设注释表有一个名为comments_id的列 SELECT A. * FROM comments INNER JOIN（SELECT comment_id，SUM（rating）汇总FROM投票GROUP BY comment_id）B USING（comment_id）ORDER BY B.sumrating;

这假设注释表有一个名为id
的列 SELECT A. * FROM comments INNER JOIN（SELECT comment_id，SUM（rating）汇总FROM投票GROUP BY comment_id）B ON A.id = B.comment_id ORDER BY B.sumrating;

热门用户

这假设users表有一个名为user_id的列 SELECT A. * FROM users INNER JOIN（SELECT user_id，SUM（rating）汇总FROM投票GROUP BY user_id）B USING（user_id）ORDER BY B.sumrating;

这假设users表有一个名为id的列 SELECT A. * FROM users INNER JOIN（SELECT user_id，SUM（rating）汇总FROM投票GROUP BY user_id）B ON A.id = B.user_id ORDER BY B.sumrating;

热门用户和评论

这假设注释表有一个名为comments_id的列，而用户有一个名为user_id的列 SELECT B. *，C。* FROM （SELECT comment_id，user_id，SUM（rating）汇总FROM投票GROUP BY comment_id，user_id）A 评论B，用户C，在哪里A.commentment_id = B.comment_id AND A.user_id = C.user_id ORDER BY A.sumrating，C.user_id，B.comment_id;

试一试!!!

mysql查询，根据投票选择最高评论

1 个答案: