-- 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.

CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT

BEGIN

DECLARE M INT;

SET M=N-1;

RETURN (

# Write your MySQL query statement below.

SELECT DISTINCT Salary FROM Employee ORDER BY Salary DESC LIMIT M,1

);

END