easy union operation
please upvote if you liked\n\n# Write your MySQL query statement below\nselect employee_id from Employees where\nemployee_id not in (select employee_id from Sal
**please upvote if you liked**\n```\n# Write your MySQL query statement below\nselect employee_id from Employees where\nemployee_id not in (select employee_id from Salaries)\nunion \nselect employee_id from Salaries where\nemployee_id not in (select employee_id from Employees) \norder by employee_id\n```
['MySQL']