Beginner Level Solution With Sub-query and Union
Please upvote if you find it helpful. Thank you :)\n\nSolution:\n\nSELECT employee_id\nFROM Employees\nWHERE employee_id NOT IN (SELECT employee_id FROM Salarie
Please **upvote** if you find it helpful. Thank you :)\n\n**Solution:**\n```\nSELECT employee_id\nFROM Employees\nWHERE employee_id NOT IN (SELECT employee_id FROM Salaries)\nUNION\nSELECT employee_id\nFROM Salaries\nWHERE employee_id NOT IN (SELECT employee_id FROM Employees)\nORDER BY employee_id;\n```
['Union Find', 'MySQL']