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	`1`	`+## 题目`
	`2`	`+[176. 第二高的薪水](https://leetcode-cn.com/problems/second-highest-salary/)`
	`3`	`+`
	`4`	`+## 思路`
	`5`	`+需要找出表中第二高的薪水,可以考虑先找出最高的薪水,再从表中找出小于最高薪水剩余部分中最高的薪水,即为第二高薪水。`
	`6`	`+`
	`7`	`+## 代码`
	`8`	+```
	`9`	`+# Write your MySQL query statement below`
	`10`	`+select max(e1.Salary) as SecondHighestSalary`
	`11`	`+from Employee e1`
	`12`	`+where e1.Salary < (`
	`13`	`+ select max(e2.Salary) from Employee e2`
	`14`	`+);`
	`15`	+```
	`16`	`+`
	`17`	`+## 相关知识`
	`18`	`+`

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