题目3：MySQL----------Nth Highest Salary

th  highest salary from the  Employee  table.

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

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

题目解答：

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

题目3：MySQL----------Nth Highest Salary

标签：sql   database   nth highest salary   

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