recover after mistakely issue alter database datafile <df1> offline drop
it is a nonarchive database , operator mistakely type
alter database datafile offline drop .
later on ( no transaction) the operator move back the and restart database
( ofcourse I think this df1 is no more linked to database)
he can not access tables on that datafile and he want to just recover it .
I think there is no option to do it . Xpert ,How do you think ?