Differences between Oracle 10g and 9i

Hello All,
We have an application developed on ASP/COM (OraOleDB Driver) and Oracle 9i as backend.
The client wants to upgrade their database from Oracle 9i to Oracle 10g.
Can anybody please tell me the major differences between Oracle 10g and 9i
on the Core Database Component which may affect the application.

Thanks and Regards
Vidya Sagar.B

Try the new features guide for differences.
http://download-west.oracle.com/docs...b14214/toc.htm

How that impacts your application? Hard to say because who here knows anything about it?