LeetCode-第二高的薪水(second-highest-salary)

第二高的薪水

难度 简单

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编写一个 SQL 查询，获取 Employee 表中第二高的薪水（Salary） 。

+----+--------+
| Id | Salary |
+----+--------+
| 1  | 100    |
| 2  | 200    |
| 3  | 300    |
+----+--------+

例如上述 Employee 表，SQL查询应该返回 200 作为第二高的薪水。如果不存在第二高的薪水，那么查询应返回 null。

+---------------------+
| SecondHighestSalary |
+---------------------+
| 200                 |
+---------------------+

Solution

Language: MySQL

# Write your MySQL query statement below
select (select distinct salary from Employee order by salary desc limit 1,1) as SecondHighestSalary ;