Hello need some help with a MySQL probem:

using the classicmodels database you installed in Module 1, list the customers who have not placed any orders. Sort your results by customer number. The query should display a list of customers who have not placed any orders.

Tables:

CUSTOMERS (customerNumber, customerName, contactlastname,contactfirstname,phone,address,city,state,country, creditlim,customer_contacts)

ORDERS: (orderNumber, orderdate,requiredDate,shippeddate,status,comments,customerNumber)

ORDERDETAILS:(orderNumber, productcode,quanity