Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Total waste of your money

Believe me, it's a total waste of your money.Poor organization of the contents and too many mistakes for beginners to learn as truth. Example: switched titles for figures of structured data and unstructured data. Wrong result of using functions such as displaying that there are 13 months between 12-March-99 and April-98. Don't be supprised to see that the result of a query shown in book is different from what you get from running Oracle SQL*Plus.