[英]mysql query count() limit to 8
Is there away to limit the result count on this query (attached). 有没有办法限制此查询的结果计数(附加)。 On attached screen shot there is a result of ten counts i'm wondering if there's a way to limit or restrict the count into 8 regardless how is the result per mobile number?
在所附的屏幕截图中,有十个计数的结果,我想知道是否有一种方法可以将计数限制或限制为8,而无论每个手机号码的结果如何? thanks
谢谢
UPDATE: 更新:
Need to update my question: I need to get the latest 8 per mobile number on this query. 需要更新我的问题:在此查询中,我需要获取每个手机号码的最新8。 see attached:
见附件:
in the results; 结果中 a mobile number 7824 has a 10 records.
手机号码7824有10条记录。 My goal is to get the total votes per each code but limited to 8 votes per mobile number.
我的目标是获得每个代码的总票数,但每个手机号码限制为8票。
Instead of: 代替:
select x.* from
do: 做:
select case when x.count > 8 then 8 else x.count end as count,
x.mobile_number,
x.code
使用以下条件:
select if(count(a.id)>8,8,count(a.id)) as count
No need of sub-query you can get by main query as per below- 不需要子查询,您可以按以下方式通过主查询获得-
SELECT IF(COUNT(a.id) > 8, 8, COUNT(a.id)) AS 'count', a.mobile_number, a.shortcode AS 'code'
FROM tbl_votes AS a
INNER JOIN tbl_members AS b ON b.mobile_number = a.mobile_number
WHERE a.possition_id = 3
GROUP BY a.mobile_number;
Updated Answer as per Updated Query: 根据更新的查询更新答案:
SELECT t.id, t.mobile_number, t.shortcode AS 'code'
FROM (SELECT t.id, t.mobile_number, t.shortcode,
CASE
WHEN @category != t.mobile_number THEN @rownum := 1
ELSE @rownum := @rownum + 1
END AS rank,
@category := t.mobile_number AS var_category
FROM tbl_votes t
JOIN tbl_members AS b ON b.mobile_number = t.mobile_number
JOIN (SELECT @rownum := NULL, @category := '') r
ORDER BY t.mobile_number,t.id DESC) X
WHERE x.rank<=8;
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