leetcode176(第二高的薪水)SQL查询实现
求:
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 |
+---------------------+
题目链接: https://leetcode-cn.com/problems/second-highest-salary/
解:
# Write your MySQL query statement below
SELECT
(
SELECT
DISTINCT
Salary
FROM
Employee
ORDER
BY
Salary
DESC
LIMIT
1
OFFSET
1
)
AS
SecondHighestSalary;
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