Instruct: Classify Amazon reviews into positive or negative sentiment
Query: How difficult to reach the top ...

The increasing difficulties in achieving original results or, more likely, in developing non repetitive hints become quite clear in this textbook.An averagely expert professional has happened to meet most impossibilities quoted in the book, and experienced how integration issues are often the synthesis of sociological, psychological, technical and economical facets. Unfortunately, the wider the scope an essay aims to, the more vagueness it risks.Good writing, proper references and sound solutions are not enough to stand out against the equally good tens of publications available about the subject. Like as many of them, it becomes a very elegant source for material to speak ABOUT the work in data warehouse environment (a treasure for slide shows!), or that can be very useful to present the whole of it to a beginner, but carrying out an actual development is a different matter.