SQL> select open_mode from v$database;
SQL> show parameter undo
SQL> alter system set undo_management=auto scope=spfile;
SQL> shutdown immediate
SQL> startup
SQL> shutdown abort
SQL> conn /as sysdba
SQL> startup mount
SQL> show parameter undo
SQL> alter system set undo_management=manual scope=spfile;
SQL> shutdown immediate;
SQL> startup
SQL> select name from v$datafile;
SQL> create undo tablespace undotbs2 datafile 'E:\ORACLE\PRODUCT\10.2.0\ORADATA\
ORACLE\UNDOTBS02.dbf' size 200m;
SQL> show parameter undo;
SQL> alter system set undo_tablespace=undotbs2 scope=spfile;
SQL> alter system set undo_management=auto scope=spfile;
SQL> show parameter spfile;
SQL> shutdown immediate;
SQL> startup
SQL> show parameter undo

本文演示了如何在Oracle数据库中配置UNDO管理,包括设置UNDO管理模式为自动和手动,创建UNDO表空间,以及调整相关参数。通过一系列SQL命令展示了整个配置过程。
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