This book has opened my eyes on many techniques and types data processing, which cannot be achieved with built-in features of MSSQL server. If you need to perform complex calculations or data processing on the database side then this book is for you.
I think the chapters about cryptography and regular expression in stored procedures are worth the price alone.
Similar results can be achieved in MSSQL 2005 using .NET, but still external procedures compiled in unmanaged C++ (especially with latest Intel C++ compiler) beat them easily in speed and memory usage. You cannot get better performance then XPs compiled with Intel’s C++ compiler.
External procedures will be useful to those people who need maximum performance accessing and processing data in time-critical environment.
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