Question

SELECT
        COUNT(t1.tid) AS count,
        u.user_name,
        SEC_TO_TIME(SUM(TIME_TO_SEC(TIMEDIFF(t1.endtime,t1.endtime)))/COUNT(t1.endtime)) AS `avg`,
        MAX(TIMEDIFF(t1.endtime,t1.starttime)) AS `max`,
        MIN(TIMEDIFF(t1.endtime,t1.starttime)) AS `min`,
        CONCAT(
            IF(t1.starttime>=(NOW() - INTERVAL 15 MINUTE), '15', ''),
            IF(t1.starttime>=(NOW() - INTERVAL 30 MINUTE), '30', ''),
            IF(t1.starttime>=(NOW() - INTERVAL 1 HOUR), 'H', ''),
            IF(t1.starttime>=(NOW() - INTERVAL 1 DAY), 'D', ''),
            IF(t1.starttime>=DATE_FORMAT(SUBDATE(NOW(), INTERVAL WEEKDAY(NOW()) DAY), '%Y-%m-%d'), 'W', ''),
            IF(t1.starttime>=CAST(DATE_FORMAT(NOW() ,'%Y-%m-01') AS DATE), 'M', '')
        ) AS period,
        t1.starttime
    FROM table1 t1
    LEFT OUTER JOIN `user` u ON u.id = t1.user_id
    WHERE t1.starttime >= CAST(DATE_FORMAT(NOW() ,'%Y-%m-01') AS DATE)
    GROUP BY user_name, period

以上是我所做的示例查询。我的目的是获得各种时间线的结果。即获得最后15分钟，1小时，1天，1周，1个月的计数，分钟，最大等等。

所以我想要的是结果如下：

+--------------+--------------+-----------------+--------------+-----------------+
| period       | count        | user            | min          | max             |
+--------------+--------------+-----------------+--------------+-----------------+
|   15mins     |   12         |   test_user1    |   00:00:45   |    00:01:45     |
|   15mins     |   12         |   test_user2    |   00:00:45   |    00:01:45     |
|   15mins     |   12         |   test_user3    |   00:00:45   |    00:01:45     |
|   15mins     |   12         |   test_user4    |   00:00:45   |    00:01:45     |
|   15mins     |   12         |   test_user5    |   00:00:45   |    00:01:45     |
|   30mins     |   15         |   test_user1    |   00:01:45   |    00:11:45     |
|   30mins     |   15         |   test_user2    |   00:01:45   |    00:11:45     |
|   30mins     |   16         |   test_user3    |   00:04:45   |    00:11:45     |
|   30mins     |   18         |   test_user4    |   00:09:45   |    00:11:45     |
|   30mins     |   19         |   test_user10   |   00:07:45   |    00:11:45     |
|   30mins     |   14         |   test_user11   |   00:04:45   |    00:11:45     |
|   30mins     |   15         |   test_user12   |   00:00:45   |    00:11:45     |
|   1day       |   100        |   test_user1    |   01:00:45   |    01:11:45     |
+--------------+--------------+-----------------+--------------+-----------------+

t1.starttime是日期时间。我们根据当前服务器时间得到结果。

Answer 1

如果您的间隔是嵌套的（在1小时内30分钟内15分钟等），那么您无法避免工会，您的查询（我简化了一下）将如下所示：

select count(t1.tid) as count, '15 min' period, userid ,
SEC_TO_TIME(SUM(TIME_TO_SEC(TIMEDIFF(t1.endtime,t1.endtime)))/COUNT(t1.endtime)) AS `avg`,
        MAX(TIMEDIFF(t1.endtime,t1.starttime)) AS `max`,
        MIN(TIMEDIFF(t1.endtime,t1.starttime)) AS `min`

from t1
where timestampdiff(minute,t1.starttime,now()) < 15 
group by userid
UNION
select count(t1.tid) as count, '30 min' , userid ,
SEC_TO_TIME(SUM(TIME_TO_SEC(TIMEDIFF(t1.endtime,t1.endtime)))/COUNT(t1.endtime)) AS `avg`,
        MAX(TIMEDIFF(t1.endtime,t1.starttime)) AS `max`,
        MIN(TIMEDIFF(t1.endtime,t1.starttime)) AS `min`

from t1
where timestampdiff(minute,t1.starttime,now()) < 30 
group by userid
UNION
select count(t1.tid) as count, '60 min', userid ,
SEC_TO_TIME(SUM(TIME_TO_SEC(TIMEDIFF(t1.endtime,t1.endtime)))/COUNT(t1.endtime)) AS `avg`,
        MAX(TIMEDIFF(t1.endtime,t1.starttime)) AS `max`,
        MIN(TIMEDIFF(t1.endtime,t1.starttime)) AS `min`

from t1
where timestampdiff(minute,t1.starttime,now()) < 60 
group by userid
/* and so on */
order by period, userid

mysql查询从不同时间段获取数据

1 个答案: