I have this many-to-one relationship; one RMA can have multiple parts returned associated with it. Second normal form would have me create a relationship table with two fields: RMA and Part Returned, which together comprise a superkey, rather than this current method where I just have a meaningless Autonumber as the ID for the parts returned table and relate it on the RMA field to the RMA table.
Is this technically, therefore, not 2NF? Does it matter?