Unanswered: this is a million bucks question to me
Please can anyone tell me about the difference Oracle 9i and Oracle 10g. I am planning to take OCA certification exam please tell me which path is good 9i or 10g. which is having bright future ? please solve my problem
Differences (actually, new features) are described in the New Features Guide that comes with every new version. Here's the documentation page - navigate to a version you are interested in, and read it.