Because the actual data is also stored in the clustered index, the correct analogy for this type of index is the book’s table of contents plus the pages themselves i.e. the whole book. So the ...

For developers working with SQL Server, few performance tuning techniques are as essential--or as frequently misunderstood--as indexing. Done right, indexing can drastically improve application ...

There's two answers to this question, the short answer and the long answer (which includes a follow-up question). The short answer is yes For the longer answer, let's start with the follow-up question ...