176. Second Highest Salary
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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 query should return 200
as the second highest salary. If there is no second highest salary, then the query should return null
.
+---------------------+ | SecondHighestSalary | +---------------------+ | 200 | +---------------------+
SELECT (SELECT DISTINCT Salary FROM Employee ORDER BY Salary DESC LIMIT 1 OFFSET 1) AS SecondHighestSalary ;
limit输出n个col, offset跳过开头n个。
select max(salary) as SecondHighestSalary from Employee where salary < (select max(salary) from Employee);
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