full export or oracle migration utility are two of your choices here .now for the choice given my experience for this kind of jobs i would say

if the databse is small say a few gigs then export import is okay.

if the databse is terrabytes then export import is big no no oracle migration utility or workbench si ideally suited to handed this kind of jobs

this is not a final advice would love to see others opinions on this one


hth
hrishy