1.1.1.1 闪回归档
前面闪回都是基于undo来实现的闪回，由于我们的闪回都是不确定时间的，所以就会导致ORA-01555（快照太旧或者被覆盖）、ORA-01466(表定义被改)、ORA-08180（没有快照）等错误。
1.1.1.1.1 创建表空间，默认大小500M
SQL> CREATE TABLESPACEhis_data_1 datafile ‘+DATA‘ size 500m;
Tablespacecreated.
1.1.1.1.2 创建默认闪回归档，保存天数为7天
SQL> create flashback archivedefault fba1 tablespace his_data_1 retention 7 day;
Flashbackarchive created.
1.1.1.1.3 创建闪回归档，保存天数为30天，配额为200M
SQL> create flashback archive fba2 tablespace his_data_1 QUOTA 200mRETENTION 30 day;
Flashbackarchive created.
1.1.1.1.4 为用户授权
SQL> grant flashback archive onfba1 to scott;
Grantsucceeded.
SQL> grant flashback archiveon fba2 to scott;
Grantsucceeded.
1.1.1.1.5 创建表，并开启闪回归档
SQL> create tableempsal_his(empno number,ename varchar2(10),sal number) flashback archive;（默认为fba1）
Tablecreated.
SQL> create table t(id int)flashback archive fba2;
Tablecreated.
1.1.1.1.6 向表内插入数据，并查看ALERT日志
17:07:57 SQL> insert intoscott.t select object_id from dba_objects;
75465rows created.
17:09:12 SQL> commit;
Commitcomplete
[[email protected] trace]$ tail -falert_oracle007.log
Thread1 advanced to log sequence 63 (LGWR switch)
Current log# 3 seq# 63 mem# 0:/u01/app/oracle/oradata/oracle007/redo03.log
ThuMay 07 17:12:06 2015
ArchivedLog entry 60 added for thread 1 sequence 62 ID 0x958cb7c1 dest 1:
ThuMay 07 16:46:52 2015
Starting background process FBDA
Thu May 07 16:46:52 2015
FBDA started with pid=27, OS id=35751
1.1.1.1.7 重建UNDO表空间
17:11:59 SQL> create undo tablespaceundotbs2 datafile ‘+DATA‘ size 100m;
Tablespacecreated.
1.1.1.1.8 更改系统undo表空间
17:14:59 SQL> alter system setundo_tablespace=‘undotbs2‘;
Systemaltered.
1.1.1.1.9 删除系统undo表空间及数据库文件（原来）
17:56:27 SQL> drop tablespace undotbs1including contents and datafiles;
Tablespacedropped.
1.1.1.1.10 查看某个时间点表的内容
查看刚创建表没有添加内容时表里的内容
SQL> select id from t as of timestampto_timestamp(‘2015-5-7 17:05:57 ‘,‘YYYY-MM-DD hh24:mi:ss‘);
norows selected
向表内增加一条数据
SQL> insert into t values(1);
1row created.
SQL> commit;
Commitcomplete.
查看在增加数据之前表里行的条数
SQL> select count(id) from t asof timestamp to_timestamp(‘2015-5-7 18:07:04‘,‘YYYY-MM-DD hh24:mi:ss‘);
COUNT(ID)
----------
75465
查看在增加数据之后表里行的条数
SQL> select count(id) from t;
COUNT(ID)
----------
75466
norows selected
1.1.1.1.11 查看闪回归档表空间大小及配额
SQL> select flashback_archive_name,tablespace_name,quota_in_mb fromdba_flashback_archive_ts;
FLASHBACK_ARCHIVE_NAME TABLESPACE_NAME
QUOTA_IN_MB
------------------------------------------------------------ ------------------------------
FBA1 HIS_DATA_1
FBA2 HIS_DATA_1
200
1.1.1.1.12 查看闪回归档日期及保存时间及默认闪回归档
SQL> selectflashback_archive_name,to_char(CREATE_TIME,‘dd-mm_yyyy‘)created,retention_in_days,statusfrom dba_flashback_archive;
FLASHBACK_ARCHIVE_NAME CREATED
RETENTION_IN_DAYS STATUS
---------------------------------------- ----------------- -------
FBA1 07-05_2015
7 DEFAULT
FBA2 07-05_2015
30
1.1.1.1.13 查看闪回归档的表信息，
SQL> select * from dba_flashback_archive_tables;
TABLE_NAME OWNER_NAME FLASHBACK_ARCHIVE_NAME ARCHIVE_TABLE_NAME STATUS
------------------------------------------------------------ ------------------------------ ------------------------------------------------------------------
EMPSAL_HIS SCOTT
FBA1 SYS_FBA_HIST_78982（后面的数字对应的是dba_object里object_id，这个表对应的是装历史数据库块的） ENABLED
T SCOTT
FBA2 SYS_FBA_HIST_78983 ENABLED
1.1.1.1.14 查看闪回归档的基表
SQL> selecttable_name,tablespace_name from user_tables where table_name like ‘%FBA%‘;
TABLE_NAME TABLESPACE_NAME
------------------------------------------------------------
SYS_FBA_DDL_COLMAP_78983（记录DDL操作） HIS_DATA_1
SYS_FBA_TCRV_78983（每一个事物、改变的信息） HIS_DATA_1
SYS_FBA_HIST_78983（记录表实际改变的数据）
1.1.1.1.15 修改闪回归档配额为200M
SQL> alterflashback archive fba1 modify tablespace his_data_1 quota 200M;
Flashback archive altered.
1.1.1.1.16 修改闪回归档保留时间为1天
SQL> alterflashback archive fba1 modify retention1 day;
Flashback archive altered.
1.1.1.1.17 删除闪回归档
SQL> drop flashback archive fba1;
Flashback archive dropped.
1.1.1.1.18手动清除所有归档
SQL> alterflashback archive fba2 purge all;
Flashback archive altered.
1.1.1.1.19
手动清除某时间段闪回归档
SQL> alterflashback archive fba2
purge before timestamp (systimestamp - interval ‘1‘ day);（清除一天前的，month，year）;
Flashback archive altered.
1.1.1.1.20
手动清除基于SCN的归档。
SQL> alter flashback archive fba2 purgebefor scn 1111