Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good book, but use the Oracle documentation as well..

This book does exactly what it sets out to do - prepare you for the OCP 9i Performance Tuning exam. However, be warned - it is not a comprehensive tuning manual, nor does it have in-depth explanations of tuning concepts. For this reason I would recommend supplementing this guide with the following books from the Oracle Docs: 1) Oracle 9i Database Performance Guide and Reference, 2) Oracle 9i Database Administrator's Guide. I used these two books and Mr. Pack's guide to clear the exam quite handily.