query: SELECT count(*) FROM Customers WHERE customer_id NOT IN (SELECT customer_id FROM Accounts)
question: Show the number of all customers without an accounts.
query_toks: SELECT count ( * ) FROM Customers WHERE customer_id NOT IN ( SELECT customer_id FROM Accounts )
query_toks_no_value: select count ( * ) from customers where customer_id not in ( select customer_id from accounts )
question_toks: Show the number of all customers without an accounts.