Change Database Name using nid

If database name being changed only then resetlogs is not required:
1. startup database in mount mode
      shutdown immediate
      startup mount
2. run nid to change database name:
      nid target=sys/0racle@DB01 dbname=DB01NAME setname=YES
3. shutdown and start database in mount mode:
      shutdown immediate
      startup mount
4. change db_name in spfile (or in pfile editing the file):
      alter system set db_name=DB01NAME scope=spfile;
5. recreate password file:
      orapwd file=orapwnewname password=syspassword
6. startup the database
      startup
7. post rename steps:
      change SID in listener.ora
      correct tnsnames.ora
      remove old trace directories
      change /etc/oratab (UNIX) or rename windows service using oradm

example:
Add missing tempfile for temporary tablespace:
SQL> alter tablespace TMP add tempfile '/u01/app/DB01NAME/oradata/datafiles/tmp01.dbf' size 2048M;

Change oratab entry:

$ vi /etc/oratab
...
#### set
...
crmd:/u01/app/DB01NAME/product/11.2.0/db_1:N