Leetcode: Nth Highest Salary

Nth Highest Salary

Similar Problems:

• Review: SQL Problems
• Tag: #sql

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

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

For example, given the above Employee table, the nth highest salary where n = 2 is 200. If there is no nth highest salary, then the query should return null.

+------------------------+
| getNthHighestSalary(2) |
+------------------------+
| 200                    |
+------------------------+

Github: code.dennyzhang.com

Credits To: leetcode.com

Leave me comments, if you have better ways to solve.

## Blog link: https://code.dennyzhang.com/nth-highest-salary
CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
  DECLARE M INT;
  DECLARE column_name varchar(100);
  set M=N-1;
  set column_name = CONCAT('getNthHighestSalary', N, ')');
  RETURN (
     select DISTINCT Salary as column_name
     from Employee
     order by Salary desc
     LIMIT M, 1
   );
END