As companies grow and do more business, the data they store in databases similarly grows. If you want to be a go-to person on the inner workings of SQL Server, then this book will be your partner in achieving that goal. If you have completed the SQL Queries Joes 2 Pros book you have written some advanced queries. This book builds on that knowledge and will show you more about the parts of SQL Server at work behind the scenes when you are running queries and creating new database objects. Most importantly, you will learn how to make the essential queries for your business run most efficiently and at the fastest speed possible.
This book was much more difficult to follow than the first and not because the content was more complex, rather because the material wasn't as interesting. During the first two I was having fun reading the books and performing labs, but I started losing interest about halfway through the book. I think if your goal is to become a DBA, then this book is necessary, but if you're just trying to improve your querying skills, then I would skip this one.