176. Second Highest Salary (Easy)
https://leetcode.com/problems/second-highest-salary/
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 | +---------------------+
Solutions
SELECT
(SELECT DISTINCT
Salary
FROM
Employee
ORDER BY
Salary DESC
LIMIT
1 OFFSET 1) AS SecondHighestSalary
;
Incorrect Solutions
select
Salary as SecondHighestSalary
from
Employee
order
by Salary desc
limit
1,1;