Second Highest Salary LeetCode Solution

Problem – Second Highest Salary LeetCode Solution

SQL Schema

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

Second Highest Salary LeetCode Solution in MySQL

select max(Salary) as SecondHighestSalary from Employee 
where Salary < (select max(Salary) from Employee)

Second Highest Salary LeetCode Solution in Oracle

select max(Salary) as SecondHighestSalary from Employee where Salary < (select max(Salary) from Employee);

Second Highest Salary LeetCode Solution in MS SQL Server

SELECT IFF(COUNT(id) >= 1, MAX(salary), null) as SecondHighestSalary from Employee
WHERE salary < (SELECT MAX(salary) from Employee)

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This Problem is intended for audiences of all experiences who are interested in learning about Data Science in a business context; there are no prerequisites.

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