Table Customer {
  id "integer" [primary key]
  first_name "text" 
  last_name "text" 
}
Table Product {
  id "integer" [primary key]
  sku "text" 
  product_name "text" 
  product_code "text" 
  quantity "integer" 
  price "decimal" 
}
Table Order {
  id "integer" [primary key]
  customer_id "integer" 
  product_id "integer" 
  quantity "integer" 
  order_total "decimal" 
}
Table Region {
  id "integer" [primary key]
  name "text" 
  label "text" 
}
Ref: Product.id <> Region.id
Ref: Order.customer_id > Customer.id
Ref: Order.product_id > Product.id