Native primary key or auto generated one?

Question

As a rule is it better to use native primary keys (ie existing columns or combination of columns) or set your primary key to an auto generating row of integers?

Answer 1

I would say auto generating, theres no real reason not to in my mind. Unless your developing some kind of hash table, but even so, I would stick to a unique primary key automatically created by the database. Its quick, simple and reliable. Don't reinvent the wheel if its already there.