README_EN.md

176. Second Highest Salary

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Description

Write a SQL query to get the second highest salary from the Employee table.

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

For example, given the above Employee table, the query should return 200 as the second highest salary. If there is no second highest salary, then the query should return null.

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

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
);