SELECT T1.staff_name ,  count(*) FROM Staff AS T1 JOIN Engineer_Visits AS T2 ON T1.staff_id  =  T2.contact_staff_id GROUP BY T1.staff_name
How many engineers did each staff contact? List both the contact staff name and number of engineers contacted.
SELECT T1.staff_name , count ( * ) FROM Staff AS T1 JOIN Engineer_Visits AS T2 ON T1.staff_id = T2.contact_staff_id GROUP BY T1.staff_name
select t1 . staff_name , count ( * ) from staff as t1 join engineer_visits as t2 on t1 . staff_id = t2 . contact_staff_id group by t1 . staff_name
How many engineers did each staff contact ? List both the contact staff name and number of engineers contacted .