https://leetcode.com/discuss/47041/very-very-simple-solution https://leetcode.com/discuss/42849/general-solution-not-using-max https://leetcode.com/discuss/21751/simple-query-which-handles-the-null-situation LeetCode All in One 题目讲解汇总(持续更新中...)...
For example, given the above Employee table, the second highest salary is200. If there is no second highest salary, then the query should returnnull. 大意是选出第二高的Salary。 1 2 3 4 # Write your MySQL query statement below selectmax(Salary)fromEmployee where Salary < (selectmax(Salary...
Can you solve this real interview question? Second Highest Salary - Table: Employee +---+---+ | Column Name | Type | +---+---+ | id | int | | salary | int | +---+---+ id is the primary key (column
For example, given the above Employee table, the second highest salary is 200. If there is no second highest salary, then the query should return null. 思路: 子查询 算法: select max(salary) from Employee where salary<(select max(salary) from Employee) 1....
https://leetcode.com/problems/second-highest-salary/description/ 题目要求输出第二大的成绩。 首先可以想到去重,然后排序,相当于输出第二个成绩。 这个用limit a offset b表示,从第b项开始,选出a个,下标从0开始 然后,如果不存在,那么要输出null,需要用isnull判断。
Can you solve this real interview question? Second Highest Salary - Table: Employee +---+---+ | Column Name | Type | +---+---+ | id | int | | salary | int | +---+---+ id is the primary key (column
题目的意思是,在Employee表中找到第二大的Salary字段,然后以别名“SecondHighestSalary ”的形式输出 解题思路: 本题有两种思路。 一种是找到找到最大值,然后我们取比最大值小一点的最大值。 SQL: SELECTMax(Salary)asSecondHighestSalaryFROMEmployeeWHERESalary<(SELECTMax(Salary)FROMEmployee); ...
SELECTMAX(e1.salary)asSecondHighestSalaryFROMEmployee e1JOINEmployee e2WHEREe1.salary<e2.salary; 2.子查询 子查询方法。用子查询找出最大值,再排除最大值的结果中,求最大值。必须要借助于MAX函数。 selectmax(salary)asSecondHighestSalaryfromEmployeewheresalary!=(selectmax(salary)fromEmployee); ...
https://leetcode.com/problems/second-highest-salary/ Write a SQL query to get the second highest salary from theEmployeetable. +---+---+ | Id | Salary | +---+---+ | 1 | 100 | | 2 | 200 | | 3 | 300 | +---+---+ 1....
5. 6. 7. For example, given the above Employee table, the second highest salary is200. If there is no second highest salary, then the query should returnnull. 解决方案如下: # Write your MySQL query statement below select max(Salary) ...