CREATE TABLE customer_orders (customer_id VARCHAR2, order_id VARCHAR2)
CREATE TABLE customers (customer_name VARCHAR2)
CREATE TABLE products (product_id VARCHAR2, product_details VARCHAR2)
CREATE TABLE order_items (order_id VARCHAR2, product_id VARCHAR2)

Find the names of customers who never ordered product Latte.
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'
SELECT "customer_name" FROM "customers" EXCEPT SELECT "t1"."customer_name" FROM "customers" "t1" JOIN "customer_orders" "t2" ON "t1"."customer_id" = "t2"."customer_id" JOIN "order_items" "t3" ON "t2"."order_id" = "t3"."order_id" JOIN "products" "t4" ON "t3"."product_id" = "t4"."product_id" AND "t4"."product_details" = 'Latte'