I rarely link to other blogs, but when I come across something that I think that you, dear readers, would appreciate I feel it would be churlish not to share. I've recently started reading Jeff Smith's SQL Server Weblog and it is a veritable cornucopia of great information. All of it is good solid advice about how to design, build and work with your database. I even forgive him using the wrong database because everything he writes is of such high quality. This article alone will come in useful whenever I have to explain the concept of primary keys to monkey coders who only understand object models. Thanks Jeff, keep up the good work.