标签：sql function where returns targe tar com end div
Source: https://leetcode.com/problems/nth-highest-salary/#/description
Description:
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 | +------------------------+
Solution:
CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT BEGIN RETURN ( select DISTINCT SALARY from ( select u1.id,u1.salary,u2.jishu from (select * from Employee)u1 inner join ( select t1.id, count(*) as jishu from ( select e1.id,e1.salary from (select salary,min(id) as id from Employee group by salary) e1 inner JOIN (select salary,min(id) as id from Employee group by salary)e2 on e1.salary <= e2.salary )t1 group by t1.id ) u2 on u1.id = u2.id )p where p.jishu =N ); END
177. Nth Highest Salary (Medium)
标签：sql function where returns targe tar com end div
原文地址：http://www.cnblogs.com/sixu/p/6884741.html
