Ok let me explain further details, I have oracle database running in a server live and the size of the database is more than 30GB. I tried to query the database within my application but it ran very slow. So, I decided to install oracle 12 (done it) and run it locally on my computer. The problem now is, how do I export the 30GB database to my local computer? Or is there any shortcut that can be done through oracle tool, such as Database Migration Assistant... perhaps? I'm new to Oracle. I have tried goggling since few days ago with no luck on how to solve this problem.