Create flashback_main.sql

flashback_main.sql

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+-- Flashback a table to point in time
+ALTER TABLE DBACLASS.EMP ENABLE ROW MOVEMENT;
+FLASHBACK TABLE DBACLASS.EMP TO TIMESTAMP
+TO_TIMESTAMP('2017-01-10 09:00:00', `YYYY-MM-DD HH24:MI:SS');
+
+
+-- recover a dropped table
+Restore the dropped table with same name:
+
+SQL>flashback table DBACLASS.EMP to before drop;
+
+Restore the dropped table with a new name
+
+SQL>Flashback table DBACLASS.EMP to before drop rename to EMP_BACKUP;
+
+Note - To recover the table, table should be present in recyclebin:
+
+select * from dba_recyclebin;
+
+
+
+-- flashback query as of timestamp
+SELECT * FROM DBACLASS.EMP AS OF TIMESTAMP
+TO_TIMESTAMP('2017-01-07 10:00:00', 'YYYY-MM-DD HH:MI:SS');
+
+SELECT * FROM DBACLASS.EMP AS OF TIMESTAMP SYSDATE -1/24;
+
+
+
+-- enable flashback
+Make sure database is in archivelog mode
+
+alter system set db_recovery_file_dest_size=10G scope=both;
+alter system set db_recovery_file_dest='/dumparea/FRA/B2BRBMT3' scope=both;
+alter database flashback on;
+
+
+
+-- create and drop GRP 
+-- To create a guarantee flashback restore point;
+
+SQL>create restore point BEFORE_UPG guarantee flashback database;
+
+-- Check the restore_points present in database
+
+SQL>select * from v$restore_point;
+
+-- Drop restore point;
+
+SQL> drop restore point BEFORE_UPG;
+
+
+
+
+
+
+
+--- Below are the steps for flashback database to a guaranteed restore point;
+
+1. Get the restore point name:
+
+SQL> select NAME,time from v$restore_point;
+
+NAME                                                            TIME
+--------------------------------          -----------------------------------------------
+GRP_1490100093811                         21-MAR-17 03.41.33.000000000 PM
+
+2. Shutdown database and start db in Mount stage:
+
+shutdown immediate;
+startup mount;
+
+3. flashback db to restore point:
+
+flashback database to restore point GRP_1490100093811;
+
+4. Open with resetlog:
+
+alter database open resetlogs:
+
+
+
+
+
+
+
+
+-- flashback a procedure or package
+
+--- Like, tables ,If you have dropped or recreated a package/procedure, by using flashback ,we can get the proc code, before drop. 
+
+get the object_id
+
+SQL> select object_id from dba_objects where owner='DBACLASS' and object_name='VOL_DISCOUNT_INSERT';
+
+OBJECT_ID
+----------
+2201943
+
+Now get the flashback code using timestamp
+
+select SOURCE from sys.source$ as of timestamp
+to_timestamp('23-Apr-2017 10:00:20','DD-Mon-YYYY hh24:MI:SS')
+where obj#=2201943 ;
+
+
+
+
+
+
+
+
+--How Far Back Can We Flashback To (Time)
+
+select to_char(oldest_flashback_time,’dd-mon-yyyy hh24:mi:ss’) “Oldest Flashback Time”
+from v$flashback_database_log;
+
+--How Far Back Can We Flashback To (SCN)
+
+col oldest_flashback_scn format 99999999999999999999999999
+select oldest_flashback_scn from v$flashback_database_log;
+
+
+
+
+
+-- flashback a table to point in time
+
+ALTER TABLE DBACLASS.EMP ENABLE ROW MOVEMENT;
+FLASHBACK TABLE DBACLASS.EMP TO TIMESTAMP
+TO_TIMESTAMP('2017-01-10 09:00:00', `YYYY-MM-DD HH24:MI:SS');