在本例中，小编将使用这款名为nid的自带工具，其在oracle_home/bin目录中。在以下的方法中，我们假设登陆到数据库本机做。
1.1 sqlplus "sys/password as sysdba"
1.2 sql>shutdown immediate --先停掉数据库
1.3 sql>startup mount --nid需要在mount状态下才能做。
1.4sql>host nid target=sys/password dbname=new_dbname --nid是一个在操作系统下执行的命令，在sqlplus环境中用host 去调用操作系统环境下的命令。命令中，当你想将数据库名字改为SOFT568X时，应写成dbname=soft568X
1.5执行后程序会询问：
Change database ID and database name SOFT568 to SOFT568X? (Y/[N]) =>y
敲y确定。
之后程序会对控制文件，数据文件进行修改：
Control File C:ORACLEORADATASOFT568CONTROL01.CTL - modified
Control File C:ORACLEORADATASOFT568CONTROL02.CTL - modified
Control File C:ORACLEORADATASOFT568CONTROL03.CTL - modified
Datafile C:ORACLEORADATASOFT568 YSTEM01.DBF - dbid changed, wrote new name
Datafile C:ORACLEORADATASOFT568UNDOTBS01.DBF - dbid changed, wrote new nam
Datafile C:ORACLEORADATASOFT568INDX01.DBF - dbid changed, wrote new name
Datafile C:ORACLEORADATASOFT568TOOLS01.DBF - dbid changed, wrote new name
Datafile C:ORACLEORADATASOFT568USERS01.DBF - dbid changed, wrote new name
Datafile D:DATAFILEPORMALS_SPA.DBF - dbid changed, wrote new name
Datafile C:ORACLEORADATASOFT568OEM_REPOSITORY.DBF - dbid changed, wrote ne
name
Datafile D:DATAFILEPORMALS_SPA_01.DBF - dbid changed, wrote new name
Datafile C:ORACLEORADATASOFT568TEMP01.DBF - dbid changed, wrote new name
Control File C:ORACLEORADATASOFT568CONTROL01.CTL - dbid changed, wrote new
name
Control File C:ORACLEORADATASOFT568CONTROL02.CTL - dbid changed, wrote new
name
Control File C:ORACLEORADATASOFT568CONTROL03.CTL - dbid changed, wrote new
name
Database name changed to SOFT568X.
Modify parameter file and generate a new password file before restarting.
Database ID for database SOFT568X changed to 2321050327.
All previous backups and archived redo logs for this database are unusable.
Shut down database and open with RESETLOGS option.
Succesfully changed database name and ID.
DBNEWID - Completed succesfully.
1.6 停库再到mount状态下改db_name:
sql>shutdown immediate;
sql>startup mount
sql>alter system set db_name=soft568X scope=spfile;
sql>shutdown immediate;
1.7 重新创建sys的password文件：
passwd文件通常放在oracle_home/database目录下，文件命名形式为PWDsid.ora，sid为实例名(Service_name)，如当前的数据库名及service_name为soft568,则passwd文件为PWDsoft568.ora
sql>host orapwd file=c:oracleora92databasepwdsoft568.ora password=123456 entries=5
要注意一下，此时虽然数据库名已经改成soft568X了，但instance_name还是soft568，所以，passwd文件必须跟以前一样。否则会出错。
1.8 开启数据库：（要open resetlogs)
sql>s
tartup mount
sql>alter database open resetlogs;
1.9 检查：
sql>select dbid,name from v$database;
2.改好数据库名后，接着改instance_name
2.1如果是windows系统，要先把所有的oracle服务先关闭，否则会出错。
2.2先将原来的service_name删除:
在操作系统中，进入cmd，
oradim -delete -sid soft568
2.3创建密码文件
orapwd file=c:/oracle/ora92/database/pwdsoft568X.ora password=....entries=
2.4创建一个新的sid，也就是你想改名的sid：
oradim -new -sid soft568X -intpwd 密码 -startmode a -pfile c:oracleora92databaseinitsoft568X.ora
当数据库启动时，会在database目录中找spfile，如果spfile不在就找initSID.ora这个文件来顶。所以，可以把pfile直接创建在这里。方便数据库的启动。
2.5 进入oracle并创建spfile：
c: set oracle_sid=soft568X
c:sqlplus "sys/password as sysdba"
sql>create spfile from pile='c:oracleora92databaseinitsoft568X.ora';
2.6 reload listener：
c:lsnrctl reload
2.7 open resetlogs:
====================================================
============改数据库名字==精简版================
1.用oracle自带的工具nid改数据库名
1.1 sqlplus "sys/zhuzerp as sysdba"
1.2 sql>shutdown immediate
1.3 sql>startup mount
1.4 sql>host nid target=sys/zhuzerp dbname=ORCLERP
1.5 Change database ID and database name zhuzerp to ORCLERP? (Y/[N]) =>y
1.6 sql>shutdown immediate
sql>startup mount
sql>alter system set db_name=ORCLERP scope=spfile;
sql>shutdown immediate
1.7 重新创建sys的password文件
host orapwd file=D:\Oracle\database\PWDzhuzerp.ora password=orclerp entries=5
1.8 sql>startup mount
sql>alter database open resetlogs;
1.9 sql>select dbid,name from v$database;
2.更改instance_name
2.1 net stop oracleservicezhuzerp
2.2 oradim -delete -sid zhuzerp
2.3 orapwd file=D:\Oracle\database\PWDORCLERP.ora password=orclerp entries=5
2.4 修改文件中的db_name和instance_name
D:\Oracle\admin\soft568\pfile\init.ora.8252009155525
2.5 oradim -new -sid ORCLERP -intpwd orclerp -startmode a -pfile D:\Oracle\admin\zhuzerp\pfile\init.ora
2.6 set oracle_sid=orclerp
2.7 sqlplus "sys/orclerp as sysdba"
2.8 create spfile from pfile='D:\Oracle\admin\zhuzerp\pfile\init.ora';
2.9 lsnrctl reload