mysql - GROUP BY 相同记录但不同 TIMESTAMP/DATETIME

Question

我正在尝试GROUP BY相同的记录，但时间戳或日期时间。 与首次进入时差仅3分钟左右。

示例:

这就是数据库表的样子。

*-------------------------------------------*
|   id  |   name    |         time          |
|   1   |   Lei     | 2018-02-21 12:00:10   |
|   2   |   Lei     | 2018-02-21 12:01:11   |
|   3   |   Lei     | 2018-02-21 12:01:15   |
|   4   |   Lei     | 2018-02-21 12:01:16   |
|   5   |   Anna    | 2018-02-21 12:03:11   |
|   6   |   Anna    | 2018-02-21 12:03:13   |
|   7   |   Bell    | 2018-02-21 12:05:01   |
|   8   |   Lei     | 2018-02-21 12:10:00   |
*-------------------------------------------*

我想要获取 Lei 从她的第一个 timestamp 或 datetime 记录开始的 12:00:10 至 3 分钟内的条目。

所以输出会是这样的。

*-------------------------------------------*
|   id  |   name    |         time          |
|   1   |   Lei     | 2018-02-21 12:00:10   |
|   5   |   Anna    | 2018-02-21 12:03:11   |
|   7   |   Bell    | 2018-02-21 12:05:01   |
|   8   |   Lei     | 2018-02-21 12:10:00   |
*-------------------------------------------*

我将很高兴感谢您的帮助，无论是 mysql 还是 php。

Answer 1

SQL Fiddle

MySQL 5.6 架构设置:

CREATE TABLE Table1
    (`id` int, `name` varchar(4), `time` datetime)
;

INSERT INTO Table1
    (`id`, `name`, `time`)
VALUES
    (1, 'Lei', '2018-02-21 12:00:10'),
    (2, 'Lei', '2018-02-21 12:01:11'),
    (3, 'Lei', '2018-02-21 12:01:15'),
    (4, 'Lei', '2018-02-21 12:01:16'),
    (5, 'Anna', '2018-02-21 12:03:11'),
    (6, 'Anna', '2018-02-21 12:03:13'),
    (7, 'Bell', '2018-02-21 12:05:01')
;

查询 1:

select id, name, min(time) as time
from Table1 
group by name
order by time

<强> Results :

    | id | name |                 time |
    |----|------|----------------------|
    |  1 |  Lei | 2018-02-21T12:00:10Z |
    |  5 | Anna | 2018-02-21T12:03:11Z |
    |  7 | Bell | 2018-02-21T12:05:01Z |

或者如果你想按间隔 3 分钟进行分组，你可以这样做

select id, name, min(time) as time
from Table1 
group by name, UNIX_TIMESTAMP(time) DIV 180
order by time
;