An ExtraView database can be backed up or recovered using standard database backup/recovery procedures. There are no customized or proprietary procedures involved.
For a more complete discussion on Oracle, consult the Oracle documentation, or view the Oracle DBA Handbook, Oracle Press, Osborne/McGraw Hill.
For Microsoft SQL Server, consult the MSSQL Books Online.
For MySQL, consult the Sun web site, or anyone of a number of excellent books published.