更改数据库SID_Oracle教程

在Oracle9i中测试通过
案例: 旧数据库([color=blue:f74257d0fd]OLDDB[/color:f74257d0fd])
        文件存放(data files,redo files,control files,temp files, undo files)目录是([color=blue:f74257d0fd]/u01/OLDDB[/color:f74257d0fd])
        dump文件目录是[color=blue:f74257d0fd](/u01/dump[/color:f74257d0fd])
      新数据库([color=red:f74257d0fd]NEWDB[/color:f74257d0fd])
        文件存放(data files,redo files,control files,temp files, undo files)目录是([color=red:f74257d0fd]/u02/NEWDB[/color:f74257d0fd])
        dump文件目录是([color=red:f74257d0fd]/u02/dump[/color:f74257d0fd])

1. 生成旧数据库初始化参数文件(init{SID}.ora)和文本格式的控制文件(control.txt)
    alter database backup controlfile to trace as '/tmp/control.txt'
    create pfile from spfile

2. 关闭旧数据库

3. 将旧数据库存放文件和dump的目录移动到新数据库存放文件和dump的目录(假如不更改存放的目录可以不执行该步骤)
   mv [color=blue:f74257d0fd]/u01/OLDDB[/color:f74257d0fd] [color=red:f74257d0fd]/u02/NEWDB[/color:f74257d0fd]
   mv [color=blue:f74257d0fd]/u01/dump[/color:f74257d0fd] [color=red:f74257d0fd]/u02/dump[/color:f74257d0fd]

4. 进入$ORACLE_HOME/dbs目录,拷贝OLDDB的pfile成NEWDB的pfile,同时修改NEWDB的pfile文件.
   cd $ORACLE_HOME/dbs
   cp initOLDDB.ora initNEWDB.ora
   修改initNEWDB.ora文件
   a. db_name和instance_name参数更改成新数据库的名称(NEWDB)
   b. background_dump_desc,core_dump_desc和user_dump_desc参数所指定存放新数据库存放dump信息的目录(/u02/dump)
   c. control_files参数所指定存放新数据库的控制文件目录及名称('/u02/NEWDB/control01.ctl','/u02/NEWDB/control02.ctl')

5. 编辑control.txt文件,新生成newdb.sql和newdb1.sql文件
   拷贝control.txt文件中以下行到/tmp/newdb.sql文件中
   ---------------
   CREATE CONTROLFILE [color=blue:f74257d0fd]REUSE[/color:f74257d0fd] DATABASE "[color=blue:f74257d0fd]OLDDB[/color:f74257d0fd]" RESETLOGS  NOARCHIVELOG
   --  SET STANDBY TO MAXIMIZE PERFORMANCE
    MAXLOGFILES 5
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 1
    MAXLOGHISTORY 453
   LOGFILE

    GROUP 1 '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/redo01.log'  SIZE 10M,
    GROUP 2 '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/redo02.log'  SIZE 10M,
      ...
    GROUP n '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/redo0n.log'  SIZE 10M
   -- STANDBY LOGFILE
   DATAFILE
    '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/system01.dbf',
    '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/undotbs01.dbf',
    '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/indx01.dbf',
    '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/tools01.dbf',
    '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/users01.dbf',
    '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/xdb01.dbf',
      ...
    '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/filename.dbf'
   CHARACTER SET ZHS16GBK
   ;
   -------------
   并修改/tmp/newdb.sql文件
   a. REUSE -> SET
   b. OLDDB -> NEWDB
   c. 存放目录 /u01/OLDDB -> /u02/NEWDB(假如不更改存放的目录可以不执行该步骤)
   更改后/tmp/newdb.sql文件内容如下
      ---------------
   CREATE CONTROLFILE [color=red:f74257d0fd]SET[/color:f74257d0fd] DATABASE "[color=red:f74257d0fd]NEWDB[/color:f74257d0fd]" RESETLOGS  NOARCHIVELOG
   --  SET STANDBY TO MAXIMIZE PERFORMANCE
    MAXLOGFILES 5
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 1
    MAXLOGHISTORY 453
   LOGFILE
    GROUP 1 '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/redo01.log'  SIZE 10M,
    GROUP 2 '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/redo02.log'  SIZE 10M,
      ...
    GROUP n '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/redo0n.log'  SIZE 10M
   -- STANDBY LOGFILE
   DATAFILE
    '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/system01.dbf',

    '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/undotbs01.dbf',
    '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/indx01.dbf',
    '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/tools01.dbf',
    '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/users01.dbf',
    '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/xdb01.dbf',
      ...
    '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/filename.dbf'
   CHARACTER SET ZHS16GBK
   ;
   -------------

   拷贝control.txt文件中以下行到/tmp/newdb1.sql文件中
   -------------
   ALTER TABLESPACE TEMP ADD TEMPFILE '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/temp01.dbf'
     SIZE 524288000  REUSE AUTOEXTEND ON NEXT 8192  MAXSIZE 32767M;
    ...
   ALTER TABLESPACE TEMPn ADD TEMPFILE '/[color=blue:f74257d0fd]u01/OLDDB[/color:f74257d0fd]/tempn.dbf'
     SIZE 524288000  REUSE AUTOEXTEND ON NEXT 8192  MAXSIZE 32767M;
   -------------
   并修改/tmp/newdb.sql文件
   a. 存放目录 /u01/OLDDB -> /u02/NEWDB(假如不更改存放的目录可以不执行该步骤)
   更改后/tmp/newdb1.sql文件内容如下
   -------------
   ALTER TABLESPACE TEMP ADD TEMPFILE '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/temp01.dbf'
     SIZE 524288000  REUSE AUTOEXTEND ON NEXT 8192  MAXSIZE 32767M;
    ...
   ALTER TABLESPACE TEMPn ADD TEMPFILE '/[color=red:f74257d0fd]u02/NEWDB[/color:f74257d0fd]/tempn.dbf'
     SIZE 524288000  REUSE AUTOEXTEND ON NEXT 8192  MAXSIZE 32767M;
   -------------

6. 删除新数据库pfile文件(initNEWDB.ora)中control_files参数所指定的控制文件.
   rm /u02/NEWDB/*.ctl

7. 启动新数据库(NEWDB)到nomount状态,使用initNEWDB.ora参数文件
   startup nomount pfile=?/dbs/initNEWDB.ora

8. 执行/tmp/newdb.sql文件,重建控制文件
   @/tmp/newdb.sql

9. 使用resetlogs选项打开新数据库(NEWDB)
   alter database open resetlogs

10. 执行/tmp/newdb1.sql文件,重建临时表空间
   @/tmp/newdb2.sql

11.
查看v$database和v$instance视图,是不是数据库名称已更改