SQL | Easy | Using SELECT & UNION
\nSELECT employee_id FROM Employees \n\tWHERE employee_id NOT IN (SELECT employee_id FROM Salaries)\nUNION\nSELECT employee_id FROM Salaries \n\tWHERE employee_
```\nSELECT employee_id FROM Employees \n\tWHERE employee_id NOT IN (SELECT employee_id FROM Salaries)\nUNION\nSELECT employee_id FROM Salaries \n\tWHERE employee_id NOT IN (SELECT employee_id FROM Employees)\nORDER BY employee_id;\n```\nPlease upvote if you found this useful :)
['Union Find', 'MySQL']