Leetcode SQL

177. Nth Highest Salary

Write a SQL query to get the nth highest salary from the Employee table.

+----+--------+
| Id | Salary |
+----+--------+
| 1 | 100 |
| 2 | 200 |
| 3 | 300 |
+----+--------+

For example, given the above Employee table, the nth highest salary where n = 2 is 200. If there is no nth highest salary, then the query should return null.

+------------------------+
| getNthHighestSalary(2) |
+------------------------+
| 200 |
+------------------------+

Solution:

create function getNthHighestSalary(N int) returns intbeginset N = N-1;
return(select distinct(Salary) from Employee
order by Salary desc limit 1 offset N);
end

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