Leetcode 181 my previous sql didn't work.

SELECT
a.NAME AS Employee
FROM Employee AS a JOIN Employee AS b
ON a.ManagerId = b.Id
AND a.Salary > b.Salary
;

what does below message mean?
{'mysql': '# Write your MySQL query statement below\n', 'mssql': '/* Write your T-SQL query statement below /\n', 'oraclesql': '/ Write your PL/SQL query statement below */\n'}