数据库设计问题：历史记录一致性

Question

I don't know what is the term it used to define this problem, let me explain here with a simple example. I have a products and orders table, with orders having one to many relationship with ordered_products table.

See the tables:-

products(id, sku, name, summary, price);

orders(id, code, customer_name, customer_address);
ordered_products(id, order_id, product_id, quantity);

Once the orders are generated, the ordered products are listed in the ordered_products table. The application then generates an invoice at that instance taking the price reference from the products table. Problem occurs! when the product that has been ordered get edited. For example if name or price is edited on the products table, the orders is affected creating a mismatch in actual orders. What's the solution here? Do I need to copy the values in the ordered_items rather than using a foreign key reference here?

Answer 1

订单通常以约定的价格下单，因此下订单后更改产品价格确实意味着您必须将ordered_price存储在ordere_products表中。