แสดงชื่อและนามสกุลของลูกค้าโดยไม่ต้องมีบัญชีใดๆ
Show the first names and last names of customers without any account.
df_customers = pd.DataFrame(columns=['customer_first_name', 'customer_last_name', 'customer_id']);df_accounts = pd.DataFrame(columns=['customer_id'])
df_customers[~df_customers['customer_id'].isin(df_accounts['customer_id'])][['customer_first_name', 'customer_last_name']]