Oracle Database for SAP

Dear Team,

My previous Database was SQL , but now I am using Oracle 8.1 Database with SAP 4.7. Oracle Databse is new for me. So please given me the some note that regularlly use in oracle. i.e how to update datafile, how to backup device Confi with Oracle Database , How to Monotoring databse with SAP .

Thanks & Regards

jagdish Kumar