Leetcode: Second Highest Salary
2015-05-14 11:30
351 查看
Get idea from here
+—-+——–+
| Id | Salary |
+—-+——–+
| 1 | 100 |
| 2 | 200 |
| 3 | 300 |
+—-+——–+
For example, given the above Employee table, the second highest salary is 200. If there is no second highest salary, then the query should return null.
Question
Write a SQL query to get the second highest salary from the Employee table.+—-+——–+
| Id | Salary |
+—-+——–+
| 1 | 100 |
| 2 | 200 |
| 3 | 300 |
+—-+——–+
For example, given the above Employee table, the second highest salary is 200. If there is no second highest salary, then the query should return null.
Other′s Solution
v1.
Second one should be less than Max one[code]# Write your MySQL query statement below select max(Salary) from Employee where Salary<(select max(Salary) from Employee)
v2.
using left join will avoid that null does not appear. We make a observation that the max one will not appear in e2[code]# Write your MySQL query statement below select e2.Salary from Employee e1 left join Employee e2 on e1.Salary>e2.Salary order by e2.Salary desc limit 1
相关文章推荐
- Leetcode 176. Second Highest Salary
- Second Highest Salary --leetCode
- LeetCode Second Highest Salary
- Second Highest Salary Leetcode
- leetcode176---Second Highest Salary
- 【leetcode】database Second Highest Salary
- Leetcode176. Second Highest Salary
- leetcode-Second Highest Salary
- Leetcode 176 Second Highest Salary
- LeetCode - Second Highest Salary
- leetcode 176. Second Highest Salary
- [leetcode]175 Second Highest Salary
- LeetCode-Algorithms #002 Add Two Numbers, Database #176 Second Highest Salary
- leetcode 176. Second Highest Salary
- leetcode 2--Second Highest Salary
- leetcode-Second Highest Salary
- leetcode 176. Second Highest Salary
- Database LeetCode Second Highest Salary
- LeetCode 176. Second Highest Salary
- LeetCode Database #176 Second Highest Salary