ORACLE 8 - Export - Import

Hi Experts,

I want to do an export - import of my Oracle DB. As I understand this could reduce my DB size.

What method do you suggest?

Can I use SAPINST 7.00 for the export -import? my SAP is 4.5B

It´s the same SAP System ID and the same server I just want to reduce my DB size.

Regards