Php MySQL正在查找值字段/值更改？

是否有一种方法可以搜索一组或多组具有特定值的行。 我希望我能准确地描述这一点

例如，这是我的表格，显示了某一时刻的车速：

| timestamp  | speed  |
| 2014-04-01 | 0.00   |
| 2014-04-02 | 0.00   |
| 2014-04-03 | 0.00   | 
| 2014-04-04 | 0.00   |
| 2014-04-05 | 0.00   |
| 2014-04-06 | 0.00   |
| 2014-04-07 | 20.00  |
| 2014-04-08 | 21.00  |
| 2014-04-09 | 24.00  |
| 2014-04-10 | 22.00  |
| 2014-04-11 | 24.00  |
| 2014-04-12 | 0.00   |
| 2014-04-13 | 0.00   |
| 2014-04-14 | 0.00   |
| 2014-04-15 | 30.00  |
| 2014-04-16 | 34.00  |
| 2014-04-17 | 37.00  |
| 2014-04-18 | 31.00  |
| 2014-04-19 | 0.00   |
| 2014-04-20 | 0.00   |
| 2014-04-21 | 0.00   |
| 2014-04-22 | 0.00   |

当速度大于0时，车辆移动， 因此，我希望输出如下：

Tour 1: 2014-04-07 - 2014-04-11
Tour 2: 2014-04-15 - 2014-04-18

有人能帮我吗

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提前谢谢

我认为一个查询是不可能的

你可以通过这种方式获得第一次旅行

SELECT * FROM table WHERE speed > 0 ORDER BY timestamp ASC

SELECT * FROM table WHERE speed = 0 AND timestamp > previous_timestamp ORDER BY timestamp ASC

SELECT * FROM table WHERE speed > 0 AND timestamp > previous_timestamp ORDER BY timestamp ASC

SELECT * FROM table WHERE speed = 0 AND timestamp > previous_timestamp ORDER BY timestamp ASC

第二，你可以通过这种方式进入

SELECT * FROM table WHERE speed > 0 ORDER BY timestamp ASC

SELECT * FROM table WHERE speed = 0 AND timestamp > previous_timestamp ORDER BY timestamp ASC

SELECT * FROM table WHERE speed > 0 AND timestamp > previous_timestamp ORDER BY timestamp ASC

SELECT * FROM table WHERE speed = 0 AND timestamp > previous_timestamp ORDER BY timestamp ASC

每次都应该为使用php的上一个查询找到的上一个时间戳值赋值

在上一次巡演中，它可能还没有完成，所以如果在上一次查询中它没有行，那么您将看到它仍在运行中

当然，你应该考虑兑现旅游，因为我知道他们的时间不会再变了。