ค้นหาชื่อลูกค้าที่ไม่เคยสั่งผลิตภัณฑ์ Latte ไม่จำเป็นต้องใช้ทุกโต๊ะ
Find the names of customers who never ordered product Latte.It is not neccessary to use all the tables.
 customer_orders:  customer_id [ VARCHAR]  order_id [ VARCHAR] 
SELECT customer_name FROM customers EXCEPT SELECT t1.customer_name FROM customers AS t1 JOIN customer_orders AS t2 ON t1.customer_id = t2.customer_id JOIN order_items AS t3 ON t2.order_id = t3.order_id JOIN products AS t4 ON t3.product_id = t4.product_id WHERE t4.product_details = 'Latte'