mysql - Database Aproach - Redundant data -

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i have 3 tables:

products (id, name, price, etc) orders (id, date, payment_method, etc) shipments (id, order_id, product_id, address, etc)

my question is: correct keep in shipments table product_id? keep here find information shipped product without using orders table.

i suggest:

products (product_id, name, price, etc) orders (order_id, date, payment_method, etc) orderitem (orderitem_id, order_id, product_id, ...) shipment (shipment_id, order_id, ... )

shipment kind of redundant - i'd add address etc orders...


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