CREATE TABLE customer (first_name VARCHAR, last_name VARCHAR, customer_id VARCHAR)
CREATE TABLE rental (customer_id VARCHAR, rental_date VARCHAR)

What is the first name and the last name of the customer who made the earliest rental?
SELECT T1.first_name, T1.last_name FROM customer AS T1 JOIN rental AS T2 ON T1.customer_id = T2.customer_id ORDER BY T2.rental_date LIMIT 1
SELECT "T1"."first_name", "T1"."last_name" FROM "customer" AS "T1" JOIN "rental" AS "T2" ON "T1"."customer_id" = "T2"."customer_id" ORDER BY "T2"."rental_date" NULLS FIRST LIMIT 1