SELECT T1.role_description ,  T2.staff_id FROM Staff_Roles AS T1 JOIN Project_Staff AS T2 ON T1.role_code  =  T2.role_code JOIN Project_outcomes AS T3 ON T2.project_id  =  T3.project_id GROUP BY T2.staff_id ORDER BY count(*) DESC LIMIT 1
For each staff id, what is the description of the role that is involved with the most number of projects?
SELECT T1.role_description , T2.staff_id FROM Staff_Roles AS T1 JOIN Project_Staff AS T2 ON T1.role_code = T2.role_code JOIN Project_outcomes AS T3 ON T2.project_id = T3.project_id GROUP BY T2.staff_id ORDER BY count ( * ) DESC LIMIT 1
select t1 . role_description , t2 . staff_id from staff_roles as t1 join project_staff as t2 on t1 . role_code = t2 . role_code join project_outcomes as t3 on t2 . project_id = t3 . project_id group by t2 . staff_id order by count ( * ) desc limit value
For each staff id , what is the description of the role that is involved with the most number of projects ?