[SQL]197. Rising Temperature

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

+---------+------------+------------------+
| 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:

+----+
| Id |
+----+
| 2 |
| 4 |
+----+
 # Write your MySQL query statement below
select w1.Id
from Weather w1,Weather w2
where datediff(w1.Date,w2.Date)=1
and w1.Temperature>w2.Temperature;
上一篇:Dynamic CRM 2013学习笔记(二十五)JS调用web service 实现多条记录复制(克隆)功能


下一篇:Egret入门学习日记 --- 第九篇(书中 2.7~2.8节 内容)