aa8d7cd2_Cost_Based_Oracle_Fundamentals__Comments
[Chapter] Appendix A [Last addendum] 1st April 2006 [Title] Upgrade Headaches [Comments] 
This may be the most important bit of the book for many people. There are many changes to the optimizer as you upgrade from 8i to 9i, and again from 9i to 10g. Some of these changes make a surprising difference to the execution paths you will see. Many of the critical changes are described throughout the book, but this appendix pulls all those changes into one brief summary.
Cost Based Oracle Fundamentals
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