Title: Other wise good book spoiled by incorrect scripts
Product review: This is a well written and good book targeted for senior DBAs. I gained a very good understanding of the Automatic Workload Repository (AWR) reading this book. But there is a huge and fundamental flaw in many of the scripts used throughout the book. Let me explain this:Most the tables in the AWR stores cumulative data for various Oracle statistics. If you think about it, it makes sense because Oracle can get the delta between two snapshots by doing subtraction. The scripts in this book does not consider this fact. I fail to understand how the authors can miss this point. Because of this the output of most of the scripts is wrong or meaningless. Of course, it is not a big deal to fix these scripts ourselves. But the fact that the authors missed this fundamental point annoys me and that is the reason for single star rating from me. I will be happy to be corrected if the authors (or some other oracle experts) can explain that scripts are indeed correct.
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