分类: Oracle
2014-01-28 09:13:56
在10g以前,要彻底删除数据库,只有两个方法,一个是利用DBCA图形化工具删除数据库,另外一个就是关闭数据库后,手工删除数据文件、控制文件以及日志文件的方法。 从10g开始,Oracle提供了DROP DATABASE的语法,使得数据库的删除变得非常的简单。 不过DROP DATABASE还是有一定的限制条件的: SQL> conn / as sysdba Connected. SQL> drop database; drop database * ERROR at line 1: ORA-01586: database must be mounted EXCLUSIVE and not open for this operation SQL> alter database close; Database altered. SQL> drop database; drop database * ERROR at line 1: ORA-12719: operation requires database is in RESTRICTED mode SQL> alter system enable restricted session; System altered. SQL> drop database; Database dropped. Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bit Production With the Partitioning, OLAP and Data Mining options SQL> exit [oracle@bjtest ~]$ ps -ef|grep test102 oracle 15805 14913 0 06:13 pts/1 00:00:00 grep test102 数据库必须处于MOUNT状态,且设置了RESTRICTED SESSION。执行了DROP DATABASE命令后,Oracle自动删除控制文件,已经控制文件中记录的数据文件和在线重做日志文件,如果数据库使用了SPFILE,那么SPFILE文件也会删除。这个命令不会删除归档文件和备份文件。 在alert文件中,可以看到drop database对应的操作: drop database Mon May 18 06:13:01 2009 Deleted file /data/oradata/test102/system01.dbf Deleted file /data/oradata/test102/undotbs1.dbf Deleted file /data/oradata/test102/sysaux01.dbf Deleted file /data/oradata/test102/redo01.log Deleted file /data/oradata/test102/redo02.log Deleted file /data/oradata/test102/redo03.log Deleted file /data/oradata/test102/redo04.log Deleted file /data/oradata/test102/redo05.log Deleted file /data/oradata/test102/redo06.log Deleted file /data/oradata/test102/redo07.log Deleted file /data/oradata/test102/temp01.dbf Instance terminated by USER, pid = 15795 Deleted file /data/oradata/test102/control01.ctl Completed: drop database Mon May 18 06:13:08 2009 Shutting down instance (abort) License high water mark = 1 |
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