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) | RecordDate(DATE) | Temperature(INT) | +---------+-----…

https://leetcode.com/problems/rising-temperature/description/ 题目需要选出今天比昨天气温高的ID 用join,默认是inner join需要左右两边同时有才行.然后就是用on判断,首先判断其是相邻的两天. 用sql的DateDiff函数判断. 不知道为何用的和网上的结论相反 DateDiff(b, a) = 1表示b是a的下一天,才能ac # Write your MySQL query statement below select…

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) | +---------+------------+----…

Write a SQL query to find all duplicate emails in a table named Person. +----+---------+ | Id | Email | +----+---------+ | 1 | a@b.com | | 2 | c@d.com | | 3 | a@b.com | +----+---------+ For example, your query should return the following for the abov…

There is a table World +-----------------+------------+------------+--------------+---------------+ | name | continent | area | population | gdp | +-----------------+------------+------------+--------------+---------------+ | Afghanistan | Asia | 652…

题目标签: 题目给了我们一个 温度表格,让我们找到 所有温度比之前一天高的,返回id. 建立 Weather w1, Weather w2,找到当w1 的温度 大于 w2 的时候,而且 w1 的日期是在w2 的后一天,返回id. Java Solution: Runtime:  338 ms, faster than 66 % Memory Usage: N/A 完成日期:06/01/2019 关键点:利用TO_DAYS 来比较日期. # Write your MySQL query state…

A pupil Tim gets homework to identify whether three line segments could possibly form a triangle. However, this assignment is very heavy because there are hundreds of records to calculate. Could you help Tim by writing a query to judge whether these…

Description Given three tables: salesperson, company, orders.Output all the names in the table salesperson, who didn’t have sales to company 'RED'. ExampleInput Table: salesperson +----------+------+--------+-----------------+-----------+ | sales_id…

Select all employee's name and bonus whose bonus is < 1000. Table:Employee +-------+--------+-----------+--------+ | empId | name | supervisor| salary | +-------+--------+-----------+--------+ | 1 | John | 3 | 1000 | | 2 | Dan | 3 | 2000 | | 3 | Brad…

Given a table salary, such as the one below, that has m=male and f=female values. Swap all f and m values (i.e., change all f values to m and vice versa) with a single update query and no intermediate temp table. For example: | id | name | sex | sala…