首先要有個數據庫完全備份

RMAN> list backup;List of Backup Sets ===================BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ --------------- 1 Full 1.11G DISK 00:01:41 23-JUN-16 BP Key: 1 Status: AVAILABLE Compressed: NO Tag: TAG20160623T202948Piece Name: /u02/app/oracle/fra/ORCL2/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqokwwn_.bkpList of Datafiles in backup set 1File LV Type Ckp SCN Ckp Time Name---- -- ---- ---------- --------- ----1 Full 2158832 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/datafile/o1_mf_system_cpo3tvhx_.dbf3 Full 2158832 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/datafile/o1_mf_sysaux_cpo3rt7b_.dbf4 Full 2158832 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/datafile/o1_mf_undotbs1_cpo3wy5w_.dbf6 Full 2158832 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/datafile/o1_mf_users_cpo3wwsy_.dbfBS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ --------------- 2 Full 596.79M DISK 00:00:35 23-JUN-16 BP Key: 2 Status: AVAILABLE Compressed: NO Tag: TAG20160623T202948Piece Name: /u02/app/oracle/fra/ORCL2/35DECF1E89340D51E053C8C4A8C0F458/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqoojb6_.bkpList of Datafiles in backup set 2Container ID: 3, PDB Name: ORCL2PDBFile LV Type Ckp SCN Ckp Time Name---- -- ---- ---------- --------- ----8 Full 2158067 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/35DECF1E89340D51E053C8C4A8C0F458/datafile/o1_mf_system_cpo4636q_.dbf9 Full 2158067 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/35DECF1E89340D51E053C8C4A8C0F458/datafile/o1_mf_sysaux_cpo46379_.dbf10 Full 2158067 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/35DECF1E89340D51E053C8C4A8C0F458/datafile/o1_mf_users_cpo472hm_.dbfBS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ --------------- 3 Full 596.74M DISK 00:00:23 23-JUN-16 BP Key: 3 Status: AVAILABLE Compressed: NO Tag: TAG20160623T202948Piece Name: /u02/app/oracle/fra/ORCL2/35DF89C6D1B814BAE053C8C4A8C09E79/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqopxm4_.bkpList of Datafiles in backup set 3Container ID: 4, PDB Name: SALESPDBFile LV Type Ckp SCN Ckp Time Name---- -- ---- ---------- --------- ----11 Full 1949411 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/35DF89C6D1B814BAE053C8C4A8C09E79/datafile/o1_mf_system_cpo77y1q_.dbf12 Full 1949411 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/35DF89C6D1B814BAE053C8C4A8C09E79/datafile/o1_mf_sysaux_cpo77y22_.dbf13 Full 1949411 23-JUN-16 /u02/app/oracle/orcl2/ORCL2/35DF89C6D1B814BAE053C8C4A8C09E79/datafile/o1_mf_users_cpo77y24_.dbfBS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ --------------- 4 Full 594.30M DISK 00:00:28 23-JUN-16 BP Key: 4 Status: AVAILABLE Compressed: NO Tag: TAG20160623T202948Piece Name: /u02/app/oracle/fra/ORCL2/35DEC3F899680A82E053C8C4A8C0792A/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqor18l_.bkpList of Datafiles in backup set 4Container ID: 2, PDB Name: PDB$SEEDFile LV Type Ckp SCN Ckp Time Name---- -- ---- ---------- --------- ----5 Full 1602940 22-JUN-16 /u02/app/oracle/orcl2/ORCL2/datafile/o1_mf_system_cpo3yld2_.dbf7 Full 1602940 22-JUN-16 /u02/app/oracle/orcl2/ORCL2/datafile/o1_mf_sysaux_cpo3ylcs_.dbfBS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ --------------- 5 Full 17.20M DISK 00:00:01 23-JUN-16 BP Key: 5 Status: AVAILABLE Compressed: NO Tag: TAG20160623T203340Piece Name: /u02/app/oracle/fra/ORCL2/autobackup/2016_06_23/o1_mf_s_915309220_cpqos5jo_.bkpSPFILE Included: Modification time: 23-JUN-16SPFILE db_unique_name: ORCL2Control File Included: Ckp SCN: 2158935 Ckp time: 23-JUN-16

查詢故障時間點

?

? ?SQL> alter session set nls_date_format='yyyymmdd hh24:mi:ss';

Session altered.

SQL> select sysdate from dual;SYSDATE ----------------- 20160623 20:43:02SQL> drop table t1;Table dropped.SQL> select timestamp_to_scn(to_timestamp('20160623 20:43:02','yyyymmdd hh24:mi:ss')) from dual;TIMESTAMP_TO_SCN(TO_TIMESTAMP('2016062320:43:02','YYYYMMDDHH24:MI:SS')) -----------------------------------------------------------------------2159581

模擬數據庫誤操作:

SQL> drop table t1;Table dropped.

數據庫恢復過程，一條命令搞定，過程大概是創建數據庫輔助實例，恢復數據庫備份到輔助實例，使用數據泵以scn為時間點導出表，再使用impdp工具導入到產品庫。

RMAN> recover table wxc.t1 of pluggable database orcl2pdb until scn 2159581 auxiliary destination '/tmp/' datapump destination '/tmp';Starting recover at 23-JUN-16 using channel ORA_DISK_1 RMAN-05026: WARNING: presuming following set of tablespaces applies to specified Point-in-TimeList of tablespaces expected to have UNDO segments Tablespace SYSTEM Tablespace UNDOTBS1Creating automatic instance, with SID='EDud'initialization parameters used for automatic instance: db_name=ORCL2 db_unique_name=EDud_pitr_orcl2pdb_ORCL2 compatible=12.1.0.2.0 db_block_size=8192 db_files=200 diagnostic_dest=/u01/app/oracle _system_trig_enabled=FALSE sga_target=1552M processes=200 db_create_file_dest=/tmp/ log_archive_dest_1='location=/tmp/' enable_pluggable_database=true _clone_one_pdb_recovery=true #No auxiliary parameter file usedstarting up automatic instance ORCL2Oracle instance startedTotal System Global Area 1627389952 bytesFixed Size 2924976 bytes Variable Size 419434064 bytes Database Buffers 1191182336 bytes Redo Buffers 13848576 bytes Automatic instance createdcontents of Memory Script: { # set requested point in time set until scn 2159581; # restore the controlfile restore clone controlfile;# mount the controlfile sql clone 'alter database mount clone database';# archive current online log sql 'alter system archive log current'; } executing Memory Scriptexecuting command: SET until clauseStarting restore at 23-JUN-16 allocated channel: ORA_AUX_DISK_1 channel ORA_AUX_DISK_1: SID=6 device type=DISKchannel ORA_AUX_DISK_1: starting datafile backup set restore channel ORA_AUX_DISK_1: restoring control file channel ORA_AUX_DISK_1: reading from backup piece /u02/app/oracle/fra/ORCL2/autobackup/2016_06_23/o1_mf_s_915309220_cpqos5jo_.bkp channel ORA_AUX_DISK_1: piece handle=/u02/app/oracle/fra/ORCL2/autobackup/2016_06_23/o1_mf_s_915309220_cpqos5jo_.bkp tag=TAG20160623T203340 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01 output file name=/tmp/ORCL2/controlfile/o1_mf_cpqq5qwd_.ctl Finished restore at 23-JUN-16sql statement: alter database mount clone databasesql statement: alter system archive log currentcontents of Memory Script: { # set requested point in time set until scn 2159581; # set destinations for recovery set and auxiliary set datafiles set newname for clone datafile 1 to new; set newname for clone datafile 4 to new; set newname for clone datafile 3 to new; set newname for clone datafile 8 to new; set newname for clone datafile 9 to new; set newname for clone tempfile 1 to new; set newname for clone tempfile 3 to new; # switch all tempfiles switch clone tempfile all; # restore the tablespaces in the recovery set and the auxiliary set restore clone datafile 1, 4, 3, 8, 9;switch clone datafile all; } executing Memory Scriptexecuting command: SET until clauseexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMErenamed tempfile 1 to /tmp/ORCL2/datafile/o1_mf_temp_%u_.tmp in control file renamed tempfile 3 to /tmp/ORCL2/datafile/o1_mf_temp_%u_.tmp in control fileStarting restore at 23-JUN-16 using channel ORA_AUX_DISK_1channel ORA_AUX_DISK_1: starting datafile backup set restore channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set channel ORA_AUX_DISK_1: restoring datafile 00001 to /tmp/ORCL2/datafile/o1_mf_system_%u_.dbf channel ORA_AUX_DISK_1: restoring datafile 00004 to /tmp/ORCL2/datafile/o1_mf_undotbs1_%u_.dbf channel ORA_AUX_DISK_1: restoring datafile 00003 to /tmp/ORCL2/datafile/o1_mf_sysaux_%u_.dbf channel ORA_AUX_DISK_1: reading from backup piece /u02/app/oracle/fra/ORCL2/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqokwwn_.bkp channel ORA_AUX_DISK_1: piece handle=/u02/app/oracle/fra/ORCL2/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqokwwn_.bkp tag=TAG20160623T202948 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:46 channel ORA_AUX_DISK_1: starting datafile backup set restore channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set channel ORA_AUX_DISK_1: restoring datafile 00008 to /tmp/ORCL2/datafile/o1_mf_system_%u_.dbf channel ORA_AUX_DISK_1: restoring datafile 00009 to /tmp/ORCL2/datafile/o1_mf_sysaux_%u_.dbf channel ORA_AUX_DISK_1: reading from backup piece /u02/app/oracle/fra/ORCL2/35DECF1E89340D51E053C8C4A8C0F458/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqoojb6_.bkp channel ORA_AUX_DISK_1: piece handle=/u02/app/oracle/fra/ORCL2/35DECF1E89340D51E053C8C4A8C0F458/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqoojb6_.bkp tag=TAG20160623T202948 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:25 Finished restore at 23-JUN-16datafile 1 switched to datafile copy input datafile copy RECID=8 STAMP=915310724 file name=/tmp/ORCL2/datafile/o1_mf_system_cpqq5xym_.dbf datafile 4 switched to datafile copy input datafile copy RECID=9 STAMP=915310724 file name=/tmp/ORCL2/datafile/o1_mf_undotbs1_cpqq5xz1_.dbf datafile 3 switched to datafile copy input datafile copy RECID=10 STAMP=915310724 file name=/tmp/ORCL2/datafile/o1_mf_sysaux_cpqq5xyw_.dbf datafile 8 switched to datafile copy input datafile copy RECID=11 STAMP=915310724 file name=/tmp/ORCL2/datafile/o1_mf_system_cpqq7cgq_.dbf datafile 9 switched to datafile copy input datafile copy RECID=12 STAMP=915310724 file name=/tmp/ORCL2/datafile/o1_mf_sysaux_cpqq7cg6_.dbfcontents of Memory Script: { # set requested point in time set until scn 2159581; # online the datafiles restored or switched sql clone "alter database datafile 1 online"; sql clone "alter database datafile 4 online"; sql clone "alter database datafile 3 online"; sql clone 'ORCL2PDB' "alter database datafile 8 online"; sql clone 'ORCL2PDB' "alter database datafile 9 online"; # recover and open database read only recover clone database tablespace "SYSTEM", "UNDOTBS1", "SYSAUX", "ORCL2PDB":"SYSTEM", "ORCL2PDB":"SYSAUX"; sql clone 'alter database open read only'; } executing Memory Scriptexecuting command: SET until clausesql statement: alter database datafile 1 onlinesql statement: alter database datafile 4 onlinesql statement: alter database datafile 3 onlinesql statement: alter database datafile 8 onlinesql statement: alter database datafile 9 onlineStarting recover at 23-JUN-16 using channel ORA_AUX_DISK_1starting media recoveryarchived log for thread 1 with sequence 14 is already on disk as file /u02/app/oracle/fra/ORCL2/archivelog/2016_06_23/o1_mf_1_14_cpqq0t9z_.arc archived log file name=/u02/app/oracle/fra/ORCL2/archivelog/2016_06_23/o1_mf_1_14_cpqq0t9z_.arc thread=1 sequence=14 media recovery complete, elapsed time: 00:00:01 Finished recover at 23-JUN-16sql statement: alter database open read onlycontents of Memory Script: { sql clone 'alter pluggable database ORCL2PDB open read only'; } executing Memory Scriptsql statement: alter pluggable database ORCL2PDB open read onlycontents of Memory Script: {sql clone "create spfile from memory";shutdown clone immediate;startup clone nomount;sql clone "alter system set control_files = ''/tmp/ORCL2/controlfile/o1_mf_cpqq5qwd_.ctl'' comment=''RMAN set'' scope=spfile";shutdown clone immediate;startup clone nomount; # mount database sql clone 'alter database mount clone database'; } executing Memory Scriptsql statement: create spfile from memorydatabase closed database dismounted Oracle instance shut downconnected to auxiliary database (not started) Oracle instance startedTotal System Global Area 1627389952 bytesFixed Size 2924976 bytes Variable Size 436211280 bytes Database Buffers 1174405120 bytes Redo Buffers 13848576 bytessql statement: alter system set control_files = ''/tmp/ORCL2/controlfile/o1_mf_cpqq5qwd_.ctl'' comment= ''RMAN set'' scope=spfileOracle instance shut downconnected to auxiliary database (not started) Oracle instance startedTotal System Global Area 1627389952 bytesFixed Size 2924976 bytes Variable Size 436211280 bytes Database Buffers 1174405120 bytes Redo Buffers 13848576 bytessql statement: alter database mount clone databasecontents of Memory Script: { # set requested point in time set until scn 2159581; # set destinations for recovery set and auxiliary set datafiles set newname for datafile 10 to new; # restore the tablespaces in the recovery set and the auxiliary set restore clone datafile 10;switch clone datafile all; } executing Memory Scriptexecuting command: SET until clauseexecuting command: SET NEWNAMEStarting restore at 23-JUN-16 allocated channel: ORA_AUX_DISK_1 channel ORA_AUX_DISK_1: SID=6 device type=DISKchannel ORA_AUX_DISK_1: starting datafile backup set restore channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set channel ORA_AUX_DISK_1: restoring datafile 00010 to /tmp/EDUD_PITR_ORCL2PDB_ORCL2/datafile/o1_mf_users_%u_.dbf channel ORA_AUX_DISK_1: reading from backup piece /u02/app/oracle/fra/ORCL2/35DECF1E89340D51E053C8C4A8C0F458/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqoojb6_.bkp channel ORA_AUX_DISK_1: piece handle=/u02/app/oracle/fra/ORCL2/35DECF1E89340D51E053C8C4A8C0F458/backupset/2016_06_23/o1_mf_nnndf_TAG20160623T202948_cpqoojb6_.bkp tag=TAG20160623T202948 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01 Finished restore at 23-JUN-16datafile 10 switched to datafile copy input datafile copy RECID=14 STAMP=915310782 file name=/tmp/EDUD_PITR_ORCL2PDB_ORCL2/datafile/o1_mf_users_cpqq9xdn_.dbfcontents of Memory Script: { # set requested point in time set until scn 2159581; # online the datafiles restored or switched sql clone 'ORCL2PDB' "alter database datafile 10 online"; # recover and open resetlogs recover clone database tablespace "ORCL2PDB":"USERS", "SYSTEM", "UNDOTBS1", "SYSAUX", "ORCL2PDB":"SYSTEM", "ORCL2PDB":"SYSAUX" delete archivelog; alter clone database open resetlogs; } executing Memory Scriptexecuting command: SET until clausesql statement: alter database datafile 10 onlineStarting recover at 23-JUN-16 using channel ORA_AUX_DISK_1starting media recoveryarchived log for thread 1 with sequence 14 is already on disk as file /u02/app/oracle/fra/ORCL2/archivelog/2016_06_23/o1_mf_1_14_cpqq0t9z_.arc archived log file name=/u02/app/oracle/fra/ORCL2/archivelog/2016_06_23/o1_mf_1_14_cpqq0t9z_.arc thread=1 sequence=14 media recovery complete, elapsed time: 00:00:00 Finished recover at 23-JUN-16database openedcontents of Memory Script: { sql clone 'alter pluggable database ORCL2PDB open'; } executing Memory Scriptsql statement: alter pluggable database ORCL2PDB opencontents of Memory Script: { # create directory for datapump import sql 'ORCL2PDB' "create or replace directory TSPITR_DIROBJ_DPDIR as '' /tmp''"; # create directory for datapump export sql clone 'ORCL2PDB' "create or replace directory TSPITR_DIROBJ_DPDIR as '' /tmp''"; } executing Memory Scriptsql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''/tmp''sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''/tmp''Performing export of tables...EXPDP> Starting "SYS"."TSPITR_EXP_EDud_bamw": EXPDP> Estimate in progress using BLOCKS method...EXPDP> Processing object type TABLE_EXPORT/TABLE/TABLE_DATAEXPDP> Total estimation using BLOCKS method: 64 KBEXPDP> Processing object type TABLE_EXPORT/TABLE/TABLEEXPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICSEXPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKEREXPDP> . . exported "WXC"."T1" 5.046 KB 1 rowsEXPDP> Master table "SYS"."TSPITR_EXP_EDud_bamw" successfully loaded/unloadedEXPDP> ******************************************************************************EXPDP> Dump file set for SYS.TSPITR_EXP_EDud_bamw is:EXPDP> /tmp/tspitr_EDud_26521.dmpEXPDP> Job "SYS"."TSPITR_EXP_EDud_bamw" successfully completed at Thu Jun 23 21:00:28 2016 elapsed 0 00:00:18 Export completedcontents of Memory Script: { # shutdown clone before import shutdown clone abort } executing Memory ScriptOracle instance shut downPerforming import of tables...IMPDP> Master table "SYS"."TSPITR_IMP_EDud_nbEc" successfully loaded/unloadedIMPDP> Starting "SYS"."TSPITR_IMP_EDud_nbEc": IMPDP> Processing object type TABLE_EXPORT/TABLE/TABLEIMPDP> Processing object type TABLE_EXPORT/TABLE/TABLE_DATAIMPDP> . . imported "WXC"."T1" 5.046 KB 1 rowsIMPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICSIMPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKERIMPDP> Job "SYS"."TSPITR_IMP_EDud_nbEc" successfully completed at Thu Jun 23 21:00:42 2016 elapsed 0 00:00:05 Import completedRemoving automatic instance Automatic instance removed auxiliary instance file /tmp/ORCL2/datafile/o1_mf_temp_cpqq8f81_.tmp deleted auxiliary instance file /tmp/ORCL2/datafile/o1_mf_temp_cpqq87tr_.tmp deleted auxiliary instance file /tmp/EDUD_PITR_ORCL2PDB_ORCL2/onlinelog/o1_mf_3_cpqqb1o4_.log deleted auxiliary instance file /tmp/EDUD_PITR_ORCL2PDB_ORCL2/onlinelog/o1_mf_2_cpqqb0hh_.log deleted auxiliary instance file /tmp/EDUD_PITR_ORCL2PDB_ORCL2/onlinelog/o1_mf_1_cpqq9zfj_.log deleted auxiliary instance file /tmp/EDUD_PITR_ORCL2PDB_ORCL2/datafile/o1_mf_users_cpqq9xdn_.dbf deleted auxiliary instance file /tmp/ORCL2/datafile/o1_mf_sysaux_cpqq7cg6_.dbf deleted auxiliary instance file /tmp/ORCL2/datafile/o1_mf_system_cpqq7cgq_.dbf deleted auxiliary instance file /tmp/ORCL2/datafile/o1_mf_sysaux_cpqq5xyw_.dbf deleted auxiliary instance file /tmp/ORCL2/datafile/o1_mf_undotbs1_cpqq5xz1_.dbf deleted auxiliary instance file /tmp/ORCL2/datafile/o1_mf_system_cpqq5xym_.dbf deleted auxiliary instance file /tmp/ORCL2/controlfile/o1_mf_cpqq5qwd_.ctl deleted auxiliary instance file tspitr_EDud_26521.dmp deleted Finished recover at 23-JUN-16

至此，整個恢復過程就結束了，類似于表空間時間點恢復，但是更加靈活和便捷。

檢查恢復后的表

SQL> select count(*) from t1;COUNT(*) ----------1

　　

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轉載于:https://www.cnblogs.com/wangxingc/p/5612100.html

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