题目10：MySQL---------Rising Temperature

Weather
+---------+------------+------------------+
| 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 |
+----+

select a.Id from Weather a,Weather b
where DATEDIFF(a.Date,b.Date)=1
and a.Temperature >b.Temperature;