Viewing the dbid of an Oracle database

(1) using Rman to view
$ Rman Target/
Recovery manager:release 11.2.0.4.0-production on Fri June 12 03:20:19 2015
Copyright (c) 1982, Oracle and/or its affiliates. All rights reserved.
Connected to target Database:dbtest (dbid=1275017193)
Rman>

(2) Use Sqlplus to view
Sql> select dbid from V$database;

DBID
----------
1275017193

(3) Dump file View

#dump日志文件
sql> alter system dump logfile '/u01/app/oracle/oradata/dbtest/redo01.log ';

#dump数据文件

sql> alter system dump DataFile '/u01/app/oracle/oradata/dbtest/users01.dbf ' block min 1 block max 4;

#dump归档日志
sql> alter system dump logfile '/home/oracle/arch/1_11_882154347.dbf ';

Then view the contents of the dump file

Viewing the dbid of an Oracle database