Building on this article from the IBM developerWorks site talking about "Five Common Database Problems", Kristian Kohntopp adds in some of his own comments for the five common problems from his perspective.

My experience in the field differs slightly from his observations, and so I thought a few annotations may be in order.

Each of the five in the list have large explainations following them, with slightly different takes on what was said before on the subject and sometimes even a few agreements here and there.