List the first and last names of all distinct staff members who are assigned to the problem whose id is 1.
create table problem_log (assigned_to_staff_id varchar, problem_id varchar, PRIMARY KEY (assigned_to_staff_id)); create table staff (staff_id varchar, PRIMARY KEY (staff_id))
select distinct staff_first_name, staff_last_name from staff as t1 join problem_log as t2 on t1.staff_id = t2.assigned_to_staff_id where t2.problem_id = 1