Products$($id: integer, title: string, price: float, quantity: integer, category: string, supplier: string$)$Customers$($id: integer, cname: string, address: string, telephone: string, email: string$)$Suppliers$($sid: integer, sup$\_$name: string, address: string, city: string, province: string, postal$\_$code: string$)$ Orders$($order$\_$id$,$ integer, cust$\_$id: integer, order$\_$date: string, order$\_$status: string, total: float$)$ ItemsPurchased$($order$\_$id: integer, product$\_$id: integer, quantity: integer, price: float, total: float$)$