(LeetCode197:上升的温度)

给定一个 Weather 表,编写一个 SQL 查询,来查找与之前(昨天的)日期相比温度更高的所有日期的 Id。

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

例如,根据上述给定的 Weather 表格,返回如下 Id:

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

Solution:

SELECT
    a.id
FROM
    Weather a,
    Weather b
WHERE
    DATEDIFF(a.RecordDate, b.RecordDate) = 1
AND a.Temperature > b.Temperature;
    原文作者:lconcise
    原文地址: https://www.jianshu.com/p/2224de9b9e10
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