176. Second Highest Salary

Second Highest Salary

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 | +---------------------+

Solution

SELECT MAX(Salary) AS SecondHighestSalary
FROM Employee
WHERE Salary < (SELECT MAX(Salary) FROM Employee)