SQL> alter system set db_recovery_file_dest_size=10g;
System altered.
SQL> alter system set db_recovery_file_dest='/arch';
System altered.
SQL> show parameter recover
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /arch
db_recovery_file_dest_size big integer 10G
db_unrecoverable_scn_tracking boolean TRUE
recovery_parallelism integer 0
SQL> select flashback_on from v$database;
FLASHBACK_ON
------------------
NO
SQL> select force_logging from v$database;
FOR
---
NO
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 7
Current log sequence 10
SQL> alter system switch logfile;
System altered.
SQL> alter system checkpoint;
System altered.
SQL> shu immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@dj ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Wed Oct 31 17:32:11 2018
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 985427968 bytes
Fixed Size 2259280 bytes
Variable Size 859834032 bytes
Database Buffers 117440512 bytes
Redo Buffers 5894144 bytes
Database mounted.
SQL> show parameter name
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
cell_offloadgroup_name string
db_file_name_convert string
db_name string syd
db_unique_name string syd
global_names boolean FALSE
instance_name string syd
lock_name_space string
log_file_name_convert string
processor_group_name string
service_names string syd
SQL> alter database archivelog;
Database altered.
SQL> alter database force logging;
Database altered.
SQL> alter database flashback on;
Database altered.
SQL> alter database open;
Database altered.
SQL> show parameter recover
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /arch
db_recovery_file_dest_size big integer 10G
db_unrecoverable_scn_tracking boolean TRUE
recovery_parallelism integer 0
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 8
Next log sequence to archive 11
Current log sequence 11
SQL> select flashback_on,force_logging from v$database;
FLASHBACK_ON FOR
------------------ ---
YES YES
SQL> select dbms_flashback.get_system_change_number from dual;
GET_SYSTEM_CHANGE_NUMBER
------------------------
1131503
SQL> conn scott/oracle
Connected.
SQL> drop table FLASH_TBL;
Table dropped.
SQL> flashback table scott.FLASH_TBL to before drop;
Flashback complete.
SQL> select * from flash_tbl;
ID VL
---------- --
10 I
11 J
12 K
13 L
14 M
15 N
16 O
17 P
18 Q
19 R
20 S
ID VL
---------- --
1 /
2 A
3 B
4 C
5 D
6 E
7 F
8 G
9 H
20 rows selected.
SQL> drop table FLASH_TBL purge;
Table dropped.
SQL> flashback table scott.FLASH_TBL to before drop;
flashback table scott.FLASH_TBL to before drop
*
ERROR at line 1:
ORA-38305: object not in RECYCLE BIN
SQL> conn /as sysdba
Connected.
SQL> shu immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@dj ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Wed Oct 31 17:44:23 2018
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup mount
ORACLE instance started.
Total System Global Area 985427968 bytes
Fixed Size 2259280 bytes
Variable Size 859834032 bytes
Database Buffers 117440512 bytes
Redo Buffers 5894144 bytes
Database mounted.
SQL> flashback database to scn 1131503;
Flashback complete.