Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not only not advanced-not beginner either

If advanced means more than I know with only 2-1/2 years with Sql then this is not an advanced book. It is mostly puzzles and things like that-not anything really useful in the real world. The worst part of it is all the errors in the code. There must be dozens of these-but where is the errata?I have a lot of comp. books and this one has more beginner mistakes and typoes than any others I have read. Not advanced and not beginner-not sure who is supposed to read it.