Tell me the date of payment with id 3.
select payment_date from payment where payment_id = 3
How about its staff name? Give the first name and last name.
select t1.first_name, t1.last_name from staff as t1 join payment as t2 on t1.staff_id = t2.staff_id where t2.payment_id = 3
tell me which staff handled the least number of payments? List the full name and the id.
select t1.first_name, t1.last_name, t1.staff_id from staff as t1 join payment as t2 on t1.staff_id = t2.staff_id group by t1.staff_id order by count(*) asc limit 1