问题描述:
编写一个 SQL 查询,获取 Employee
表中第二高的薪水(Salary) 。
+----+--------+ | Id | Salary | +----+--------+ | 1 | 100 | | 2 | 200 | | 3 | 300 | +----+--------+
例如上述 Employee
表,SQL查询应该返回 200
作为第二高的薪水。如果不存在第二高的薪水,那么查询应返回 null
。
+---------------------+ | SecondHighestSalary | +---------------------+ | 200 | +---------------------+
sql:
select max(Salary) as SecondHighestSalary from Employee where
Salary < (select max(Salary) from Employee )
2018-09-15 11:20:44
原文地址:https://www.cnblogs.com/NPC-assange/p/9650374.html
时间: 2024-10-09 23:43:20