Show me the names of the employee.
select employee_name from employees;
What is the role code of the employee named Koby?
select t1.role_code from roles as t1 join employees as t2 on t1.role_code = t2.role_code where t2.employee_name = "Koby";
How about his role description?
select t1.role_description from roles as t1 join employees as t2 on t1.role_code = t2.role_code where t2.employee_name = "Koby";