I was wondering, where can i find a step-by-step guide on how to export from a higher version (11g) to a lower version (9i and 10g) of oracle database? Thank you very much!
I believe export from 11g to 9i is not supported but will probably work. 11g to 10g is fine. Basic rules are:
Ideally you want to be using the latest patch release of each version.
You can find the full documentation including step-by-step operation of the export and import utilities here: