query: SELECT T1.staff_id ,  T1.staff_name FROM staff AS T1 JOIN Staff_Department_Assignments AS T2 ON T1.staff_id  =  T2.staff_id ORDER BY date_assigned_to - date_assigned_from LIMIT 1
question: What the id and name of that staff what which has done been assigned for that least amount of time?
query_toks: SELECT T1.staff_id , T1.staff_name FROM staff AS T1 JOIN Staff_Department_Assignments AS T2 ON T1.staff_id = T2.staff_id ORDER BY date_assigned_to - date_assigned_from LIMIT 1
query_toks_no_value: select t1 . staff_id , t1 . staff_name from staff as t1 join staff_department_assignments as t2 on t1 . staff_id = t2 . staff_id order by date_assigned_to - date_assigned_from limit value
question_toks: What the id and name of that staff what which has done been assigned for that least amount of time?