Backup database using rman (always make at least one backup even on empty database!)

sqlplus
connect as sysdba
startup nomount
rman
connect target /
mount database 
BACKUP DATABASE INCLUDE CURRENT CONTROLFILE;
recover

then recover database;

Create Oracle database for Control sql backend (not available in free version)

start sqlplus: 

sqlplus /nolog
connect sysadmin/sql as sysdba
startup nomount

CategorySql