Rising Temperature:查詢比前一天氣溫高的天氣ID
阿新 • • 發佈：2019-01-10
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 | +---------+------------+------------------+
+----+ | Id | +----+ | 2 | | 4 | +----+SQL Schema： Create table If Not Exists Weather (Id int, Date date, Temperature int) Truncate table Weather insert into Weather (Id, Date, Temperature) values ('1', '2015-01-01', '10') insert
思路：SELECT Weather.Id as 'Id' FROM Weather JOIN Weather w ON DATEDIFF(Weather.Date,w.Date) = 1 AND Weather.Temperature > w.Temperature