下面我们做一个实验，演示如何对oracle进行基于时间点的不完全恢复（在实验之前请确保数据库具有有效备份）：
获取此时的时间并记录下来：
SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;
TO_CHAR(SYSDATE,'YY
-------------------
2014-08-23 00:47:49
把hh用户下的h2删除：
SQL> drop table h2;
Table dropped.
使用rman将数据库恢复到删除h2之前：
关闭数据库，启动rman，重启数据库到mount：
SQL> conn /as sysdba
Connected.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
[oracle@localhost ~]$ rman target / nocatalog
Recovery Manager: Release 11.2.0.1.0 - Production on Sat Aug 23 00:55:12 2014
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database (not started)
RMAN> startup mount;
Oracle instance started
database mounted
Total System Global Area 849530880 bytes
Fixed Size 1339824 bytes
Variable Size 553651792 bytes
Database Buffers 289406976 bytes
Redo Buffers 5132288 bytes
使用rman将数据库恢复到2014-08-23 00:47:49
获取此时的时间并记录下来：
SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;
TO_CHAR(SYSDATE,'YY
-------------------
2014-08-23 00:47:49
把hh用户下的h2删除：
SQL> drop table h2;
Table dropped.
使用rman将数据库恢复到删除h2之前：
关闭数据库，启动rman，重启数据库到mount：
SQL> conn /as sysdba
Connected.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
[oracle@localhost ~]$ rman target / nocatalog
Recovery Manager: Release 11.2.0.1.0 - Production on Sat Aug 23 00:55:12 2014
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database (not started)
RMAN> startup mount;
Oracle instance started
database mounted
Total System Global Area 849530880 bytes
Fixed Size 1339824 bytes
Variable Size 553651792 bytes
Database Buffers 289406976 bytes
Redo Buffers 5132288 bytes
使用rman将数据库恢复到2014-08-23 00:47:49
RMAN> sql 'alter session set nls_date_format="yyyy-mm-dd hh24:mi:ss"';
sql statement: alter session set nls_date_format="yyyy-mm-dd hh24:mi:ss"
RMAN> restore database until time '2014-08-23 00:47:49';
Starting restore at 23-AUG-14
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=18 device type=DISK
skipping datafile 6; already restored to file /u01/app/datafile/test01.dbf
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00003 to /u01/app/oracle/oradata/orcl/undotbs01.dbf
channel ORA_DISK_1: restoring datafile 00005 to /u01/app/oracle/oradata/orcl/example01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0qpgkgjo_1_1
channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0qpgkgjo_1_1 tag=FULLDB
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:06
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00002 to /u01/app/oracle/oradata/orcl/sysaux01.dbf
channel ORA_DISK_1: restoring datafile 00004 to /u01/app/oracle/oradata/orcl/users01.dbf
channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle/oradata/orcl/hh01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0ppgkgjo_1_1
channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0ppgkgjo_1_1 tag=FULLDB
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:35
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00001 to /u01/app/oracle/oradata/orcl/system01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0opgkgjo_1_1
channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0opgkgjo_1_1 tag=FULLDB
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:45
Finished restore at 23-AUG-14
RMAN> recover database until time '2014-08-23 00:47:49';
Starting recover at 23-AUG-14
using channel ORA_DISK_1
starting media recovery
archived log for thread 1 with sequence 1 is already on disk as file /u01/app/archivelog/dest1/1_1_856304357.dbf
archived log for thread 1 with sequence 2 is already on disk as file /u01/app/archivelog/dest1/1_2_856304357.dbf
archived log for thread 1 with sequence 3 is already on disk as file /u01/app/archivelog/dest1/1_3_856304357.dbf
archived log for thread 1 with sequence 1 is already on disk as file /u01/app/archivelog/dest1/1_1_856310126.dbf
archived log file name=/u01/app/archivelog/dest1/1_1_856304357.dbf thread=1 sequence=1
archived log file name=/u01/app/archivelog/dest1/1_2_856304357.dbf thread=1 sequence=2
archived log file name=/u01/app/archivelog/dest1/1_3_856304357.dbf thread=1 sequence=3
media recovery complete, elapsed time: 00:00:16
Finished recover at 23-AUG-14
使用resetlogs打开数据库：
SQL> alter database open resetlogs;
Database altered.
SQL> select * from hh.h2;
ID
----------
1
2
sql statement: alter session set nls_date_format="yyyy-mm-dd hh24:mi:ss"
Starting restore at 23-AUG-14
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=18 device type=DISK
skipping datafile 6; already restored to file /u01/app/datafile/test01.dbf
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00003 to /u01/app/oracle/oradata/orcl/undotbs01.dbf
channel ORA_DISK_1: restoring datafile 00005 to /u01/app/oracle/oradata/orcl/example01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0qpgkgjo_1_1
channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0qpgkgjo_1_1 tag=FULLDB
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:06
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00002 to /u01/app/oracle/oradata/orcl/sysaux01.dbf
channel ORA_DISK_1: restoring datafile 00004 to /u01/app/oracle/oradata/orcl/users01.dbf
channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle/oradata/orcl/hh01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0ppgkgjo_1_1
channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0ppgkgjo_1_1 tag=FULLDB
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:35
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00001 to /u01/app/oracle/oradata/orcl/system01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0opgkgjo_1_1
channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0opgkgjo_1_1 tag=FULLDB
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:45
Finished restore at 23-AUG-14
RMAN> recover database until time '2014-08-23 00:47:49';
Starting recover at 23-AUG-14
using channel ORA_DISK_1
starting media recovery
archived log for thread 1 with sequence 1 is already on disk as file /u01/app/archivelog/dest1/1_1_856304357.dbf
archived log for thread 1 with sequence 2 is already on disk as file /u01/app/archivelog/dest1/1_2_856304357.dbf
archived log for thread 1 with sequence 3 is already on disk as file /u01/app/archivelog/dest1/1_3_856304357.dbf
archived log for thread 1 with sequence 1 is already on disk as file /u01/app/archivelog/dest1/1_1_856310126.dbf
archived log file name=/u01/app/archivelog/dest1/1_1_856304357.dbf thread=1 sequence=1
archived log file name=/u01/app/archivelog/dest1/1_2_856304357.dbf thread=1 sequence=2
archived log file name=/u01/app/archivelog/dest1/1_3_856304357.dbf thread=1 sequence=3
media recovery complete, elapsed time: 00:00:16
Finished recover at 23-AUG-14
SQL> alter database open resetlogs;
Database altered.
SQL> select * from hh.h2;
ID
----------
1
2
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/29800581/viewspace-1256504/ ，如需转载，请注明出处，否则将追究法律责任。
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