แสดงชื่อและนามสกุลให้กับลูกค้าที่มีชื่อบัญชี 900
Show the first name and last name for the customer with account name 900.
df_Accounts = pd.DataFrame(columns = ['customer_id', 'account_name'])
df_Customers = pd.DataFrame(columns = ['customer_first_name', 'customer_last_name', 'customer_id'])
df_Customers[df_Customers['customer_id'] == df_Accounts[df_Accounts['account_name'] == '900']['customer_id'].values[0]][['customer_first_name', 'customer_last_name']]