LeetCode-MySQL: Second Highest Salary
Problem:
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
.
Solution: 返回Employee表中第二高的Salary值,使用MySQL嵌套查询,先返回最大Salary值,再用not in过滤这个最大值,然后返回剩下记录里最大的Salary. SQL如下:
|
|