content: This book starts with "What is PL/SQL?". But through the following 900 pages, I could not find a simple example showing how to test run a simple PL/SQL code or procedure through Oracle sqlplus or other Oracle calling interface, such as OCI and Proc. Well, my rating above might be biased. I made a career change from physics to become a professional C/C++ programmer by reading K&R's C Programming Language to begin with. However, I do not feel reading this book alone can get me anywhere but waste all my time. If five stars for K&R's, one star is all for this book. It's a matter of Simple and Beautiful vs Complicate and Ugly.