Oracle document, or search youtube. But OBIEE is very hard for starter, dimensional modeling is so abstract. OBIEE is a very big topic, there so many areas to go. As a starter, you can only pick one direction.
to learn OBIEE, you need have to learn some basic concepts of Data warehouse especially OLAP. Those concepts are quite abstract for people from OLTP background. Without these knowledge, all you can learn just system admin.
论坛元老