我想对结果添加限制,例如,只有那些在 votes 字段中具有两个最高值的记录才应该出现在结果中。
查询:
SELECT `dev`.`user_id` , `dev`.`fullname` , COUNT( `pom_votes`.`performer_id` ) AS votes
FROM `pom_votes`
INNER JOIN `dev` ON `pom_votes`.`performer_id` = `dev`.`user_id`
WHERE MONTH( pom_votes.created_at ) =1
AND YEAR( pom_votes.created_at ) =2017
GROUP BY `performer_id`
ORDER BY `votes` DESC , `id` DESC
输出:
user_id | fullname | votes
--------------------------
53 | test1 | 3 |
60 | test2 | 2 |
57 | test3 | 2 |
55 | test4 | 2 |
52 | test5 | 2 |
51 | test6 | 2 |
75 | test7 | 1 |
83 | test8 | 1 |
61 | test9 | 1 |
58 | test10 | 1 |
需要输出:
user_id | fullname | votes
--------------------------
53 | test1 | 3 |
60 | test2 | 2 |
57 | test3 | 2 |
55 | test4 | 2 |
52 | test5 | 2 |
51 | test6 | 2 |
解释:
在需要的输出中看到,我想要所有在 votes 字段中具有最多两个最高值的记录。
最佳答案
我在处理这两个单独的查询时得到了它:
查询 1:
select DISTINCT count(`pom_votes`.`performer_id`) as votes from `pom_votes` where MONTH(pom_votes.created_at) = 1 and YEAR(pom_votes.created_at) = 2017 group by `performer_id` order by `votes` desc, `id` desc LIMIT 2
查询 2:
select `dev`.`user_id`, `dev`.`fullname`, count(`pom_votes`.`performer_id`) as votes from `pom_votes` inner join `dev` on `pom_votes`.`performer_id` = `dev`.`user_id` where MONTH(pom_votes.created_at) = 1 and YEAR(pom_votes.created_at) = 2017 group by `performer_id` having votes in(RESULT OF QUERY 1) order by `votes` desc, `id` desc
可能不是完美的解决方案,但它确实有效。
关于mysql - 获取特定字段具有两个最高值的所有记录 - MySQL,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41717775/