Yes, many DB2 programmers they are still not updating their skills in DB2. IBM adding new versions of DB2 with advanced features. These are like Cloud computing, Analytics, Super savings of CPU time, in turn cost savings etc.
I have given here some tips, just follow these steps one by one, and you will become master in DB2. This practice helps you for both DB2 UDB and DB2 ZOS.
Certification DB2: DB2 Certification process. Certification is the key to success.
DB2 Various Editions: Editions Currently Available and Latest Changes of IBM-DB2