Skip to content

Latest commit

 

History

History
96 lines (77 loc) · 1.9 KB

README_EN.md

File metadata and controls

96 lines (77 loc) · 1.9 KB
Raw

176. Second Highest Salary

中文文档

Description

Table: Employee

+-------------+------+
| Column Name | Type |
+-------------+------+
| id          | int  |
| salary      | int  |
+-------------+------+
id is the primary key column for this table.
Each row of this table contains information about the salary of an employee.

 

Write an SQL query to report the second highest salary from the Employee table. If there is no second highest salary, the query should report null.

The query result format is in the following example.

 

Example 1:

Input: 
Employee table:
+----+--------+
| id | salary |
+----+--------+
| 1  | 100    |
| 2  | 200    |
| 3  | 300    |
+----+--------+
Output: 
+---------------------+
| SecondHighestSalary |
+---------------------+
| 200                 |
+---------------------+

Example 2:

Input: 
Employee table:
+----+--------+
| id | salary |
+----+--------+
| 1  | 100    |
+----+--------+
Output: 
+---------------------+
| SecondHighestSalary |
+---------------------+
| null                |
+---------------------+

Solutions

SQL

Solution 1: Use Sub Query and LIMIT.

# Write your MySQL query statement below
SELECT
(
    SELECT DISTINCT Salary
    FROM Employee
    ORDER BY Salary DESC
    LIMIT 1 OFFSET 1
) AS SecondHighestSalary;

Solution 2: Use MAX() function.

# Write your MySQL query statement below
SELECT MAX(Salary) AS SecondHighestSalary
FROM Employee
WHERE Salary < (
    SELECT MAX(Salary)
    FROM Employee
);