[1]Well, I'd say pick up that fat juicy 9i datawarehouse manual and start reading it!

[2] This is also a sort of an eye opener to all newcomers(we'll after more than 2 1/2 yr exp with oracle I still feel line a newcomer!!) when it comes to saying I'm an Oracle DBA. So when you say you're certified dba and not having studied datawarehousing then I wonder what the employer would make of your cert if he had DWH


[3] There are sample schema's in oracle 9i where you canstart playing around to exercise the understanding of the basics you picked up from various sources incl oracle manuals etc.

[4] But don't even try to say you're an datawarehouse specialist if you lack that real world exp in datawarehouse...

But on the +ve note, you gotta begin somewhere, so like i said pick up that juicy fat datwarehouse oracle manual....