Recovery without any backup is normally not supported, however,
Oracle Consulting can sometimes extract data from an offline database
using a utility called DUL (Disk UnLoad). This utility reads data in the
data files and unloads it into SQL*Loader or export dump files. DUL
does not care about rollback segments, corrupted blocks, etc, and can
thus not guarantee that the data is not logically corrupt. It is intended
as an absolute last resort and will most likely cost your company a lot
of money!!!