Dear All,

I need to port one of our apps to Oracle as backend.
So it will be ClientServer , NTIER with preferably easily switchable
backend.

All links to articles, hints, clues etc are highly appreciated.

Oracle owners ;

How complex is Oracle Administration ?

How about cost of ownership ?
Is there any periodical fees to be paid to Oracle after main licence is purchased ?

Again any help is highly appreciated.

TIA
Sergio