Recently I started a discussion on oraclecommunity.net database forum with subject “Why Oracle?”. Hans Forbrich and Billy Verreynne gave important feedbacks. As a group we are preparing a free half day seminar to the computer science students in Istanbul.
When I started to study 10g I tried to blog my experiences on new pl/sql packages with a series called Expanded Supplied Packages with 10g. If you do not want to waste your time and money on developing some features which are already available in your database, it is better to be aware of them. As Tom Kyte‘s saying; no need to re-invent a dumper wheel :) For 11g here is a start point for the new and updated ones;
Recently I was playing with DBMS_ADVANCED_REWRITE package which was also a new feature on 10g. You may want to use this package for rewriting a bad query on your production database until it is tuned or even to make your friends go mad with changed results to their queries on your development database :)
Testing Information : the scripts mentioned are tested on Oracle Database 11g Enterprise Edition Release 188.8.131.52.0