Do link tables need a meaningless primary key field?

Question

I am working on a couple of link tables and I got to thinking (Danger Will Robinson, Danger) what are the possible structures of a link table and what are their pro\'s and c

Answer 1

Having a single column pk can help out alot in disaster recovery situation. So though while correct in theory that you only need the 2 foreign keys. In practice when the shit hits the fan you may want the single column key. I have never been in a situation where i was screwed because I had a single column identifier but I have been in ones where I was screwed because I didn't.