Simple solution using Union
Write your MySQL query statement below\nselect employee_id from Employees where employee_id not in (select employee_id from Salaries) union\nselect employee_id 
# Write your MySQL query statement below\nselect employee_id from Employees where employee_id not in (select employee_id from Salaries) union\nselect employee_id from Salaries where employee_id not in (select employee_id from Employees) order by employee_id
['Union Find', 'MySQL']