leetcode-197-Rising-Temperature

描述


Given a Weather table, write a SQL query to find all dates’ Ids with higher temperature compared to its previous (yesterday’s) dates.

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+---------+------------+------------------+
| Id(INT) | Date(DATE) | Temperature(INT) |
+---------+------------+------------------+
| 1 | 2015-01-01 | 10 |
| 2 | 2015-01-02 | 25 |
| 3 | 2015-01-03 | 20 |
| 4 | 2015-01-04 | 30 |
+---------+------------+------------------+

For example, return the following Ids for the above Weather table:

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+----+
| Id |
+----+
| 2 |
| 4 |
+----+

分析


找出时间相隔一天,后一天温度比前一天温度要高的 Id

解决方案(MySQL)


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# Write your MySQL query statement below
SELECT
t1.Id
FROM Weather t1, Weather t2
WHERE TO_DAYS(t1.Date)-TO_DAYS(t2.Date)=1 AND t1.Temperature > t2.Temperature

题目来源