[英]Get all the records which has two most highest values for a specific field - MySQL
I want to add restrictions on the result like, only those records should appear in the result which has two most highest value for votes field. 我想在结果上添加限制,只有那些记录应该出现在结果中,该结果具有两个最高值的投票字段。
Query: 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
Output: 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 |
Needed output: 需要的输出:
user_id | fullname | votes
--------------------------
53 | test1 | 3 |
60 | test2 | 2 |
57 | test3 | 2 |
55 | test4 | 2 |
52 | test5 | 2 |
51 | test6 | 2 |
Explanation: 说明:
See in the needed output, I want all the records which has most two highest values for votes field. 看到所需的输出,我想所有这一切对现场投票最多两个最高值的记录。
I got it working with this two separate queries: 我得到了这两个单独的查询:
Queries 1: 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
Queries 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
Might not be the perfect solution, but it works. 可能不是一个完美的解决方案,但它的工作原理。
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