SQL Server Indexes

In my previous entry, I asked a question : "I wonder what is the difference between creating an index consisting of two column, compared to creating 2 index (one for each column)?" I, myself, was not sure to whom did I address this question, but I manage to get some answers today.

SQL Server Indexes http://www.odetocode.com/Articles/70.aspx

Contains some very good explainations on how database indices works (SQL Server to be exact), about composite index (one index containing multiple column), clustered vs unclustered Index, and some guidelines on using them.