I will focus on Oracle Advanced topics

1. Indexes and Storage Types

2. Transactions and Locks

http://www.wisc.edu/drmt/oratips/sess004.html

3. Oracle and XML Integration

4. Oracle Database Extensions for .NET

5. Debugging PL/SQL
6. Tuning PL/SQL Applications

http://www.wisc.edu/drmt/oratips/sess006.html
7. Tracing PL/SQL Execution