[LeetCode][SQL]Nth Highest Salary

Nth Highest Salary

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.

https://leetcode.com/problems/nth-highest-salary/

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题目是不难的，就是谁能告诉我为什么我本地的MySQL无论如何都是错的。

加上delimiter $$也并没有什么用...

还有第7行为毛不能加分号或者$$...

#drop function getNthHighestSalary$$
CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
DECLARE M INT;
SET M = N - 1;
  RETURN (
      select distinct Salary from Employee order by Salary desc limit M, 1
  );
END