mysql - MySQL 查询日期范围

Question

我用谷歌搜索但没有找到任何相关的东西。我有一个这样的 MySQL 表：

+++++++++++++++++++++++++++++++++++
| 房间号 | 日期 | 价格 |
+++++++++++++++++++++++++++++++++++
| 1 | 2012-10-10 | 10 |
| 1 | 2012-10-11 | 10 |
| 1 | 2012-10-12 | 10 |
| 1 | 2012-10-13 | 12 |
| 2 | 2012-10-10 | 15 |
| 2 | 2012-10-11 | 15 |
| 2 | 2012-10-12 | 15 |
| 2 | 2012-10-13 | 16 |
| 2 | 2012-10-14 | 16 |
| 2 | 2012-10-15 | 16 |
+++++++++++++++++++++++++++++++++++

我需要根据价格和 roomID 获取期间：

++++++++++++++++++++++++++++++++++++++++++++++++
| 房间号 | 来自 | 直到 | 价格 |
++++++++++++++++++++++++++++++++++++++++++++++++
| 1 | 2012-10-10 | 2012-10-12 | 10 |
| 1 | 2012-10-13 | 2012-10-13 | 12 |
| 2 | 2012-10-10 | 2012-10-12 | 15 |
| 2 | 2012-10-13 | 2012-10-15 | 16 |
++++++++++++++++++++++++++++++++++++++++++++++++

谢谢！

Answer 1

select roomid,
       min(date) as from,
       max(date) as till,
       price
from periods
group by price
order by price

Answer 2

您可以尝试使用以下查询：

SELECT roomid, MIN(date) AS `from`, MAX(date) AS `till`, price
FROM tableName
GROUP BY price
ORDER BY price