以下是我的表看起来像的样子
| total_hit |success_hit | date_time |
| 12 | 12 | 01-11-2009 07:32:44 |
| 12 | 11 | 01-11-2009 08:33:49 |
| 12 | 10 | 01-11-2009 09:08:24 |
| 12 | 11 | 01-12-2009 10:33:57 |
| 12 | 12 | 01-12-2009 11:37:34 |
| 12 | 11 | 01-12-2009 12:23:49 |
我使用以下查询从表中获取过去30天的数据:
SELECT *
FROM my_table
WHERE DATE(date_time) >= DATE_SUB(CURDATE(), INTERVAL 1 MONTH)
我想做的是根据日期对返回的数据进行分组,并计算成功率(success_hit/total_hit)*100
类似的东西
Date: 01-11-2009 Percentage: x
Date: 01-12-2009 Percentage: y
有什么想法吗?
select (success/total)*100 as perc_success, Date(date_time) from
(select sum(success_hit) as success, sum(total_hit) as total,
date_time from my_table
where DATE(date_time) >= DATE_SUB(CURDATE(), INTERVAL 1 MONTH)
group by Date(date_time) )
tbl
这应该有效!!!
试试这个
SELECT (sum(success_hit)/sum(total_hit)*100) AS `Percentage`,
DATE(date_time) AS `Date`
FROM my_table
WHERE DATE(date_time) >= DATE_SUB(CURDATE(), INTERVAL 1 MONTH)
GROUP BY DATE(date_time);