How many times have you sat down at the computer to write a sales letter or an article and just piddled and hem-hawed around in front of a blank word document trying come up with something to write, or waiting to get into the mood?
A database index is similar to an index in a book ? it is comprised of a lookup value, and a number identifier that corresponds to the row number in a table. In SQL Server, there are two kinds of indexes ? clustered and non-clustered.