# 176. 第二高的薪水

![在这里插入图片描述](https://img-blog.csdnimg.cn/20190513220311576.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2phY2tpZV9vMm8y,size_16,color_FFFFFF,t_70)

1.首先思路就是倒序排列，用limit限制输出。\
2.但是如果不存在则不会返回null，因此需要作为临时表

```sql
# Write your MySQL query statement below
SELECT
    (SELECT DISTINCT Salary
        FROM Employee
        ORDER BY Salary DESC
        LIMIT 1,1) AS SecondHighestSalary
```


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