what is the name of the customer of customer code 401
select customer_name from customers where customer_code = 401
what is address of the customer Ahmed?
select customer_address from customers where customer_name = 'Ahmed'
what is the address of the customer lukas?
select customer_address from customers where customer_name = 'Lukas'
what is customer code of lukas?
select customer_code from customers where customer_name = 'Lukas'