[LeetCode] Nth Highest Salary 第N高薪水
作者:互联网
题目
编写一个 SQL 查询,获取 Employee
表中第 n 高的薪水(Salary)。
+----+--------+
| Id | Salary |
+----+--------+
| 1 | 100 |
| 2 | 200 |
| 3 | 300 |
+----+--------+
例如上述 Employee
表,n = 2 时,应返回第二高的薪水 200
。如果不存在第 n 高的薪水,那么查询应返回 null
。
+------------------------+
| getNthHighestSalary(2) |
+------------------------+
| 200 |
+------------------------+
解法
CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
SET N = N - 1;
RETURN (
SELECT DISTINCT Salary FROM Employee GROUP BY Salary
ORDER BY Salary DESC LIMIT 1 OFFSET N
);
END
标签:Salary,200,薪水,Nth,getNthHighestSalary,Employee,Highest,INT 来源: https://www.cnblogs.com/qiuhuashan/p/11060540.html