Show the first name and last name for the customer with account name 900.
SELECT T2.customer_first_name ,  T2.customer_last_name FROM Accounts AS T1 JOIN Customers AS T2 ON T1.customer_id  =  T2.customer_id WHERE T1.account_name  =  "900"
customer with account name 900 refers to WHERE account_name = '900'; first name and last name for the customer refers to SELECT customer_first_name, customer_last_name; joining Accounts and Customers tables on customer_id refers to JOIN...ON T1.customer_id = T2.customer_id;