Here you go for the DB2 Presentations for its variety of features..
DB2 9 for z/OS RRF Overview & Not Logged Table Spaces
DB2 9 for z/OS Multi-Row Static Insert & Fetch – Coding it in COBOL
DB2 9 for z/OS Detailed RRF & Reading the DB2 Log
DB2 9 for z/OS Security including Trusted Context & Roles
DB2 9 for z/OS Partitioning and Cloned Tables
Multi-Row Fetch Using Dynamic SQL In COBOL
