Oracle10g新增命令用以简化用户管理的备份,可以通过  
  alter database begin/end backup来进行数据库备份模式的切换。
  $ sqlplus "/ as sysdba"  
  SQL*Plus: Release 10.1.0.2.0 - Production on Wed Apr 6 22:31:33 2005  
  Copyright (c) 1982, 2004, Oracle. All rights reserved.  
  Connected to:
  Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bit Production
  With the Partitioning, OLAP and Data Mining options  
  SYS AS SYSDBA on 06-APR-05 >alter database begin backup;  
  Database altered.  
  SYS AS SYSDBA on 06-APR-05 >desc v$backup
   Name                   Null?  Type
   ----------------------------------------- -------- ----------------------------
   FILE#                       NUMBER
   STATUS                       VARCHAR2(18)
   CHANGE#                      NUMBER
   TIME                        DATE  
  SYS AS SYSDBA on 06-APR-05 >select * from v$backup;  
     FILE# STATUS        CHANGE# TIME
  ---------- ------------------ ---------- ------------
       1 ACTIVE        11000149 06-APR-05
       2 ACTIVE        11000149 06-APR-05
       3 ACTIVE        11000149 06-APR-05
       4 ACTIVE        11000149 06-APR-05
       5 ACTIVE        11000149 06-APR-05
       6 ACTIVE        11000149 06-APR-05
       7 ACTIVE        11000149 06-APR-05
       9 ACTIVE        11000149 06-APR-05
      10 ACTIVE        11000149 06-APR-05
      11 ACTIVE        11000149 06-APR-05  
  10 rows selected.  
  SYS AS SYSDBA on 06-APR-05 >alter database end backup;
  Database altered.  
  SYS AS SYSDBA on 06-APR-05 >select * from v$backup;  
     FILE# STATUS        CHANGE# TIME
  ---------- ------------------ ---------- ------------
       1 NOT ACTIVE      11000149 06-APR-05
       2 NOT ACTIVE      11000149 06-APR-05
       3 NOT ACTIVE      11000149 06-APR-05
       4 NOT ACTIVE      11000149 06-APR-05
       5 NOT ACTIVE      11000149 06-APR-05
       6 NOT ACTIVE      11000149 06-APR-05
       7 NOT ACTIVE      11000149 06-APR-05
       9 NOT ACTIVE      11000149 06-APR-05
      10 NOT ACTIVE      11000149 06-APR-05
      11 NOT ACTIVE      11000149 06-APR-05  
  10 rows selected.  
  SYS AS SYSDBA on 06-APR-05 > 
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