SQL> select flashback_on from v$database;
FLASHBACK_ON
------------------------------------------------------
YES
SQL> set linesize 3000;
SQL> select * from scott.dept;
DEPTNO DNAME LOC
---------- ------------------------------------------ ---------------------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL> delete from scott.dept where deptno=40;
1 row deleted.
SQL> commit;
Commit complete.
SQL> select * from scott.dept as of timestamp sysdate-10/1440;
DEPTNO DNAME LOC
---------- ------------------------------------------ ---------------------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL> select * from scott.dept;
DEPTNO DNAME LOC
---------- ------------------------------------------ ---------------------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
SQL> flashback table scott.dept to timestamp to_timestamp(‘2019-07-15 10:50:00‘,‘yyyy-mm-dd hh24:mi:ss‘);
Flashback complete.
SQL> select * from scott.dept;
DEPTNO DNAME LOC
---------- ------------------------------------------ ---------------------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL> select * from scott.dept;
DEPTNO DNAME LOC
---------- ------------------------------------------ ---------------------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL> select * from scott.t1;
ID
----------
1
2
3
4
5
6
7
8
8 rows selected.
SQL> drop table scott.t1;
Table dropped.
SQL> select * from scott.t1;
select * from scott.t1
*
ERROR at line 1:
ORA-00942: ???????
SQL> show recyclebin;
SQL> conn scott/tiger
Connected.
SQL> show recyclebin;
ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME
---------------- ------------------------------ ------------ -------------------
T1 BIN$jbDeCRWbPyvgUww4qMBWZQ==$0 TABLE 2019-07-15:11:29:27
SQL> flashback table t1 to before drop;
Flashback complete.
SQL> select * from t1;
ID
----------
1
2
3
4
5
6
7
8
8 rows selected.
SQL> drop table t1;
Table dropped.
SQL> show recyclebin;
ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME
---------------- ------------------------------ ------------ -------------------
T1 BIN$jbDjk1f0Qg/gUww4qMDc8w==$0 TABLE 2019-07-15:11:31:00
SQL> flashback table t1 to before drop;
Flashback complete.
SQL> select * from t1;
ID
----------
1
2
3
4
5
6
7
8
8 rows selected.
[[email protected] ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on 星期一 7月 15 11:40:51 2019
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select to_char(systimestamp,‘yyyy-mm-dd HH24:MI:SS‘) as sysdt , dbms_flashback.get_system_change_number scn from dual;
SYSDT SCN
--------------------------------------------------------- ----------
2019-07-15 11:40:53 990134
SQL> truncate table scott.t1;
Table truncated.
SQL> SQL> select * from scott.t1;
no rows selected
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 1586708480 bytes
Fixed Size 2253624 bytes
Variable Size 973081800 bytes
Database Buffers 603979776 bytes
Redo Buffers 7393280 bytes
Database mounted.
SQL> flashback database to timestamp to_timestamp(‘2019-07-15 11:40:53‘,‘yyyy-mm-dd hh24:mi:ss‘);
Flashback complete.
SQL> alter database open resetlogs;
Database altered.
SQL> select * from scott.t1;
ID
----------
1
2
3
4
5
6
7
8
8 rows selected.
原文地址：https://blog.51cto.com/860143/2420287