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Problem
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 INT
BEGIN
SET N=N-1;
RETURN (
SELECT DISTINCT Salary
FROM Employee
ORDER BY Salary DESC
LIMIT 1 OFFSET N
);
END
正文完
