What's the best practice for primary keys in tables?

Question

When designing tables, I\'ve developed a habit of having one column that is unique and that I make the primary key. This is achieved in three ways depending on requirements

Answer 1

I suspect Steven A. Lowe's rolled up newspaper therapy is required for the designer of the original data structure.

As an aside, GUIDs as a primary key can be a performance hog. I wouldn't recommend it.