ใครสั่งล่าสุด?
Who made the latest order?
df_customer_orders = pd.DataFrame(columns=['customer_id', 'order_date']); df_customers = pd.DataFrame(columns=['customer_name', 'customer_id'])
df_customers.loc[df_customers['customer_id'] == df_customer_orders.loc[df_customer_orders['order_date'].idxmax()]['customer_id']]['customer_name']