SQL*Plus
conn system/manager
创建实验表空间
create tablespace test datafile
'c:\test.ora' size 5M
AUTOEXTEND ON NEXT 1M MAXSIZE UNLIMITED
default storage (initial 128K next 1M pctincrease 0)
/
创建实验用户
drop user test cascade;
create user test identified by test default tablespace test;
grant connect,resource to test;
conn test/test
create table a(a number);
insert into a values(1);
insert into a select * from a;反复插入,达到100万条
commit;
关闭数据库
SVRMGR connect internal
SVRMGR alter system switch logfile;强制归档
SVRMGR alter system switch logfile;
SVRMGR alter system switch logfile;
SVRMGR shutdown
操作系统下删除test.ora文件
重新启动数据库
SVRMGR connect internal
SVRMGR startup
这时,可以mount上,但无法打开,因为数据文件test.ora不存在,
显示错误如下:
ORA-01157: ????/?????? 8 - ??? DBWR ????
ORA-01110: ???? 8: 'C:\TEST.ORA'
SVRMGR connect internal
SVRMGR startup mount
SVRMGR alter database create datafile 'c:\test.ora';
SVRMGR set autorecovery on
SVRMGR recover datafile 'c:\test.ora';
SVRMGR alter database open;
conn test/test
select count(*) from a;数据又恢复到100万条
删除实验表空间
conn system/manager
alter tablespace test offline;
drop tablespace test INCLUDING CONTENTS;
drop user test;
假如是非归档模式,也可以运用以上方法,
前提是:输入记录所占空间的大小不超过所有联机日志文件的大小
即:用联机日志文件来恢复