# 177. Nth Highest Salary

Write a SQL query to get the  n th highest salary from the `Employee` table.

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

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

``````CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
SET N = N - 1;
RETURN (
SELECT DISTINCT Salary FROM Employee GROUP BY Salary
ORDER BY Salary DESC LIMIT 1 OFFSET N
);
END
``````

``````CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
RETURN (
SELECT MAX(Salary) FROM Employee E1
WHERE N - 1 =
(SELECT COUNT(DISTINCT(E2.Salary)) FROM Employee E2
WHERE E2.Salary > E1.Salary)
);
END
``````

``````CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
RETURN (
SELECT MAX(Salary) FROM Employee E1
WHERE N =
(SELECT COUNT(DISTINCT(E2.Salary)) FROM Employee E2
WHERE E2.Salary >= E1.Salary)
);
END
``````

Second Highest Salary

https://leetcode.com/discuss/63183/fastest-solution-without-using-order-declaring-variables

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