176. Second Highest Salary

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

Constraints

Approach

Links

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Examples

Example 1

Input:

{"headers": {"Employee": ["Id", "Salary"]}, "rows": {"Employee": [[1, 100], [2, 200], [3, 300]]}}

Output:

{"headers": ["SecondHighestSalary"], "values": [[200]]}

Solutions

Solution 1

# MySQL query statement

SELECT MAX(salary) AS SecondHighestSalary 
FROM Employee 
WHERE salary != (SELECT MAX(salary) FROM Employee);

Solution 2

# MySQL query statement

SELECT DISTINCT
    Salary AS SecondHighestSalary
FROM
    Employee
ORDER BY Salary DESC
LIMIT 1 OFFSET 1

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