MySQL SHORTEST Solution
This is the shortest solution ever \n\nSELECT employee_id FROM Employees\nWHERE employee_id NOT IN (SELECT employee_id FROM Salaries)\nUNION\nSELECT employee_id
This is the shortest solution ever \n```\nSELECT employee_id FROM Employees\nWHERE employee_id NOT IN (SELECT employee_id FROM Salaries)\nUNION\nSELECT employee_id FROM Salaries \nWHERE employee_id NOT IN (SELECT employee_id FROM Employees)\nORDER BY employee_id\n```\n\n***Please UPVOTE***
['Union Find', 'MySQL']