What is the full name of the staff member who has rented a film to a customer with the first name April and the last name Burns?
SELECT DISTINCT T1.first_name ,  T1.last_name FROM staff AS T1 JOIN rental AS T2 ON T1.staff_id  =  T2.staff_id JOIN customer AS T3 ON T2.customer_id  =  T3.customer_id WHERE T3.first_name  =  'APRIL' AND T3.last_name  =  'BURNS'
full name = first_name + last_name; staff member who has rented a film refers to staff table joined with rental table; to a customer with first name April and last name Burns refers to joining with customer table where first_name = 'APRIL' and last_name = 'BURNS'; DISTINCT is used to ensure unique names are returned.