Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not worth of buying!

A very poorly compiled, full of errors (spellings and contents) practice workbook. None of the three authors has actually passed the OCP DBA certification. This book should be entitled Element Oracle 101. It is definitely not the book that can help you to prepare the real OCP exams. I already returned the book and asked my money back. Very surprised the Prentice Hall can publish such a useless book. Shame to PH!