Database: sakila_1
Question: Which customer, who has made at least one payment, has spent the least money? List his or her first name, last name, and the id.
SQL: select t1.first_name ,  t1.last_name ,  t1.customer_id from customer as t1 join payment as t2 on t1.customer_id  =  t2.customer_id group by t1.customer_id order by sum(amount) asc limit 1