180612_Nth_highest
2018-06-12 本文已影响0人
郑磊_4135
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 |
CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
DECLARE M INT;
SET M = N -1;
RETURN (
# Write your MySQL query statement below.
SELECT DISTINCT e.Salary
FROM Employee as e
ORDER BY e.Salary DESC
LIMIT M, 1
);
END
