Question

大家好我有这个时间专栏这样的数据

time    |
------- |
9:17:19 |
9:17:23 |
9:17:28 |
9:17:33 |
9:17:38 |
9:18:03 |
9:18:08 |
9:18:13 |
9:18:18 |
9:19:03 | 
9:19:13 |
9:19:59 |
9:20:04 |
9:20:59 |
9:21:04 |
9:21:09 |
9:21:54 |
9:21:59 |
9:22:04 |
9:22:09 |

从这一栏开始，我的结果应该是我想要的每一分钟

9:17:19 |
9:18:03 |
9:19:03 |
9:20:04 |
9:21:04 |
9:22:04 |

如果有任何错误，请原谅我。

Answer 1

假设time具有TIME数据类型：

  SELECT MIN(time)
    FROM table
GROUP BY LEFT(time,5)
ORDER BY time;

或者更少污秽：

  SELECT MIN(time)
    FROM table
GROUP BY HOUR(time), MINUTE(time)
ORDER BY time;

Answer 2

可能是这样的

SELECT MIN(Time) 
FROM Table1
GROUP BY HOUR(time),MINUTE(Time)

<强> FIDDLE DEMO

Answer 3

简单，它是：

 select * from table_name group by concat(hour(`time`), minute(`time`));

如何从这组给定的值中选择第一次

3 个答案: