Flashback provides a way to view past states of database objects, or to return database objects to a previous state, without using traditional point-in-time recovery.

learn more… | top users | synonyms

2
votes
0answers
17 views

Keeping version history / Slowly changing dimension

We're creating a new version of a 20 years old database, in which we used to keep version history by creating new rows in each table (SCD Type 2). SCD Type 2 is not that hard when you need to keep ...
2
votes
2answers
996 views

How to disable flashback query logging for a specific table (Oracle)?

We have a specific table that has a lot of activity and it creates a lot of change records. The consequence is that the flashback data only goes back a couple of days. That is OK for many cases but it ...
0
votes
0answers
16 views

Recreating an artificial Oracle Flashback Archive

I have an databases where changes to data were tracked by adding auditing timestamp columns to the end of each row. I want to migrate to Oracle's Total recall or Flashback archive so I need to trick ...
0
votes
1answer
66 views

Oracle 11.2 restore DB to a specific point

I should execute following tasks: 1. test system and during test change Oracle data and Create New/Remove Old datafiles and tablespace. 2. at the end of test rollback to behviour before of point 1. ...
2
votes
1answer
123 views

Can you use “RENAME” instead of “FLASHBACK TABLE” to restore a table in Oracle?

Just a general question about flashback and the recycle bin in Oracle. I tried doing this on a demo oracle database I have but the recycle bin does not seem to want to be populated; and I want a ...
1
vote
1answer
94 views

Extract from Oracle at given time

I have a requirement to retrieve (extract) data from an Oracle database (either 9i or 10g) as at a given point in time. I will need access to the data at this point of time for several days ...
-1
votes
1answer
65 views

quick checkpoints for development mode

i'm a programmer, not a dba. i need a mechanism to quickly make a snapshot of a database (oracle 11g XE) before i run migration. migration changes data, grants, DDL (tables, triggers, lexers, views ...
1
vote
1answer
90 views

Emulating Oracle flashback functionality [closed]

I'm considering going from Oracle Enterprise Edition (EE) to SE/SE1 but want to retain the flashback database and flashback table features from EE. Does anyone know how to emulate these features in ...
3
votes
5answers
2k views

Modifying table structure within a transaction?

In Oracle (and probably elsewhere), executing an ALTER TABLE statement will do an implicit commit on the current transaction. We have a tool (written in Java) that should modify a schema by: adding ...
1
vote
1answer
192 views

Is there a way to export Oracle's UNDO?

I tried exp utility to dump all database. Looks like this exports only the last version of data skipping undo log. Using flashback queries I see: 01466. 00000 - "unable to read data - table ...
2
votes
1answer
856 views

Flashback feature in Oracle 11g?

I am using Oracle 11gR1. As a part of a project, I have to execute multiple update statements by disabling a few constraints (triggers and check constraints) which could result in a corrupted ...
2
votes
1answer
520 views

the value of undo_sql in flashback_transaction_query view is always null

so I have a table defined as follow: `create table test.test as (select * from dual); and ran the following update statements: update test.test set dummy = '1' where dummy = 'X'; commit; I want ...
2
votes
2answers
592 views

Duplicating a Database with RMAN

I would like to duplicate to the same server Oracle Database with RMAN. I've configured flash recovery area for Oracle Database. My database is using SPFILE as shown below. SQL> SELECT ...
0
votes
1answer
5k views

How to purge logs by using Flashback feature in Oracle Database

I’ve configured flash recovery area for Oracle Database. My question is: how can I delete Flashback Database log?or is there any retention policy for that? 2- After I’ve enabled archive log mode and ...
13
votes
3answers
4k views

What other databases have a feature similar to Oracle's Flashback Query?

I am interested to know what other databases have features similar to Oracle's Flashback Query. It would seem that any database that supports MVCC could have the feature, but which do? SO has this ...
4
votes
2answers
664 views

Migrating to Oracle Flashback for Historization on Oracle 11g

Our application built using Oracle 11g requires that we keep historic data. The historization is legally mandated, and is mainly used for manual queries, when investigating problems, etc. Basically ...
3
votes
1answer
901 views

Find out if two rows came from same transaction in Oracle

I am using Oracle 11.1 and would like to figure out if two rows in one table where inserted by the same transaction. Is there an easy sql statement to map a row to an transactions id? The table is an ...
1
vote
1answer
300 views

Difference between Flashback Query and Serializable Transaction Mode?

Is there any conceptual difference between a SERIALIZABLE Transaction and a Flashback Query?