LeetCode force buckle brush title database (197): rising temperature

topic

Weather given a table, write a SQL query, to find higher before the date (yesterday) compared to the temperature Id all dates.

For example, according to the table given Weather, returns the following Id:

Resolve

Methods: JOIN and DATEDIFF () clause
algorithm

MySQL to compare the values ​​of two types of dates using DATEDIFF.

Therefore, we can combine with the weather by itself, using the DATEDIFF () function.

MySQL

SELECT
    weather.id AS 'Id'
FROM
    weather
        JOIN
    weather w ON DATEDIFF(weather.date, w.date) = 1
        AND weather.Temperature > w.Temperature
;

answer

SELECT
    weather.id AS 'Id'
FROM
    weather
        JOIN
    weather w ON DATEDIFF(weather.recorddate, w.recorddate) = 1
        AND weather.Temperature > w.Temperature
;