Recover from a loss of a temporary tablespace

This article is about a recovery of temporary tablespace. As we know that Temporary tablespaces are used to manage space for database sort operations and for storing global temporary tables. For example, if you join two large tables, and Oracle cannot do the sort in memory (see SORT_AREA_SIZE initialization parameter), space will be allocated in […]

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Recover from a loss of a read-only tablespace

Being an Oracle DBA we are aware that there are many types of backups are available for Oracle database maintenance in the same way we have multiple ways to restore our database. One question raises here that why do we need have a different kind of ways to backup and recovery in Oracle database? Answer of this question […]

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Switchback to the original location of the previously corrupted/damaged datafile

In this article, we are going to have look on How to switch back to the original location of the previously corrupted/damaged/lost/canceled datafile.

As you can see the datafile of USERS tablespace is currently located in the flash recovery area. And there is no USERS datafile on the location where other datafiles are.

First […]

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Recover a corrupted/damaged NON-SYSTEM datafile switching to an image copy when database in ARCHIVELOG mode

This article is about recovery of corrupted/damaged/lost/canceled NONSYSTEM datafile switching to an image copy when database in ARCHIVELOG mode. We must have an image copy of my datafiles: The following command is use to take copy.

Now let’s simulate a lost datafile of a NONSYSTEM tablespace

The RMAN report command is no more able […]

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How to recover a corrupted/damaged NON SYSTEM datafile when database in ARCHIVELOG mode

We are going to have a session on recovery about corrupted/damaged/lost/canceled NONSYSTEM datafile (except system & sysaux).  Before proceeding to be sure to have a complete backup of your test database and be sure your database is in ARCHIVELOG mode.

And it’s in ARCHIVELOG mode

Connecting through RMAN I can receive information about […]

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Backup a database in non-archivelog mode without recovery catalog

This article is about the backup of an Oracle database. As DBA we are well known about the types of backup.  Mainly we have two kind of backups in Oracle database first one is physical and another one is logical.  Each type of backups is important in Oracle database’s life maintenance. It depends on projects and client’s requirements that what kind of […]

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Restore a NON-ARCHIVELOG database using a backup controlfile

Being a DBA we must have knowledge on all kind of situation come across database’s life maintenance. We all are aware that CDR  (Controlfile, Datafile, Redologfile) plays a most important role in Oracle database. With the help of backup, we can restore the database . In this article, we are going to learn about the recovery from controlfile in noarchivelog mode. […]

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Restore a NOARCHIVELOG database using current control file

We are going to have a look at recovery in Oracle database.  it’s time to cause a fault in the database so we need to recover it. The scenario is the following: what does it happen and how can I recover a database in NOARCHIVELOG mode when a disk failure occurs and I lost my current […]

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