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FLASHBACK DATABASE → Purpose Use the FLASHBACK DATABASE command to rewind the database to a target time, SCN, or log … exist when you run the command. Flashback can fix logical failures, but not physical failures. Thus … . FLASHBACK DATABASE is usually much faster than a RESTORE operation followed by point-in-time recovery … , because the time needed
Performing a Flashback Table Operation → In this scenario, assume that you want to perform a flashback of the hr.temp_employees table after … a user made some incorrect updates. The perform a flashback of temp_employees: Connect SQL*Plus to … the target database and identify the current SCN. You cannot roll back a FLASHBACK TABLE statement … , but you can issue another
Performing a Flashback Drop Operation → Use the FLASHBACK TABLE... TO BEFORE DROP statement to recover objects from the recycle bin. You … and drop hr.employee_demo. You decide to use FLASHBACK TABLE to retrieve the dropped object. To … can also use Flashback Query on tables in the recycle bin, but only by using the recycle bin name … bin. Retrieve the dropped table.
Performing a Flashback Database Operation → This section presents a basic technique for performing a flashback of the database, specifying the … most recent OPEN RESETLOGS, see \"Rewinding an OPEN RESETLOGS Operation with Flashback Database\". By … default, an SCN used in a FLASHBACK DATABASE command refers to an SCN in the direct ancestral path … Incarnation Branch\".
TO BEFORE SEQUENCE integer THREAD integer Specifies a redo log sequence number and thread as an upper… → most recent OPEN RESETLOGS. Note: FLASHBACK DATABASE can only return the database to a point before … to convert the time to the current format, for example, FLASHBACK DATABASE TO TIME 'SYSDATE-7'. Query … can flash back. Examples Example 2-87 FLASHBACK DATABASE to a Specific SCN Assume that you inserted … query the earliest SCN
Table 2-8 How FLASHBACK DATABASE Responds to Data File Status Changes → The earliest SCN that can be used for a Flashback Database operation depends on the setting of the … DB_FLASHBACK_RETENTION_TARGET initialization parameter, and on the actual retention of flashback … NOLOGGING Operations on Flashback Database When using FLASHBACK DATABASE with a target time at which a … Flashback
Using Flashback Drop and Managing the Recycle Bin → Flashback Drop, and the FLASHBACK TABLE statement is used to restore the table. Before discussing the … use of the FLASHBACK TABLE statement for this purpose, it is important to understand how the
Performing Flashback Database with SQL*Plus → Oracle Flashback Database returns your entire database to a previous state without requiring you to … restore files from backup. The SQL*Plus FLASHBACK DATABASE command performs the same function as … the RMAN FLASHBACK DATABASE command: it returns the database to a prior state. Flashback Database … requires you
Starting and Configuring RMAN and Flashback Database → Part II Starting and Configuring RMAN and Flashback Database The chapters in this part explain the … Environment: Advanced Topics\" Chapter 7, \"Using Flashback Database and Restore Points\"
Rewinding a Table with Flashback Table → Flashback Drop relies on a mechanism called the recycle bin, which the database uses to manage … Developer's Guide to learn how to use the logical flashback features \"Understanding Flashback … to use Flashback Database, and on the related restore points feature Rewinding a Table with … Flashback
7 Using Flashback Database and Restore Points → This chapter explains Flashback Database, restore points. This chapter discusses configuring … contains the following topics: Understanding Flashback Database, Restore Points and Guaranteed … Restore Points Logging for Flashback Database and Guaranteed Restore Points Prerequisites for Flashback … Database and
Rewinding a Database with Flashback Database → This section explains the most common scenario for using Flashback Database to reverse unwanted changes to your database.
Rewinding a Database with Flashback Database → You can use the Oracle Flashback Database to rewind the whole database to a past time. Unlike media … RMAN FLASHBACK DATABASE command, your database must have been previously configured to generate … flashback logs. This configuration task is described in \"Flashback Database\". Flashback Database works
flashback logfile sync → Waits for flashback database data to be written to disk. Wait Time: Includes RVWR writing the … flashback database data and posting this process Parameters: None
Overview of User-Managed Media Recovery → This section provides an overview of recovery with SQL*Plus. This section contains the following topics: About User-Managed Restore and Recovery Automatic Recovery with the RECOVER Command Recovery When Archived Logs Are in the Default Location Recovery When Archived Logs Are in a Nondefault Location Recovery Cancellation Parallel Media Recovery
About User-Managed Restore and Recovery → Typically, you restore a file when a media failure or user error has damaged or deleted multiple data files. In a user-managed restore operation, you use an operating system utility to restore a backup of the file. If a media failure affects data files, then the recovery procedure depends on: The archiving mode of the database: ARCHIVELOG or NOARCHIVELOG The type of media failure The files affected
Performing Complete Database Recovery → Typically, media recovery is limited by data block reads and writes. Parallel recovery attempts to use all of the available I/O bandwidth of the system to improve performance. Unless there is a system I/O bottleneck or poor asynchronous I/O support, parallel recovery is likely to improve performance of recovery. To override the default behavior of performing parallel recovery, use the SQL*Plus RECOVER
Performing Closed Database Recovery → also use Flashback Database, but this procedure affects all data files and returns the entire database
Table 29-5 Media Recovery Solutions → If You Suspect... Then... Missing or misnamed archived redo logs Determine whether you entered the correct file name. If you did, then check whether the log is missing from the operating system. If it is missing, and if you have a backup, then restore the backup and apply the log. If you do not have a backup, then if possible perform incomplete recovery up to the point of the missing log. ORA-1113
Performing Trial Recovery → When problems such as stuck recovery occur, you have a difficult choice. If the block is relatively unimportant, and if the problem is isolated, then it is better to corrupt the block. But if the problem is not isolated, then it may be better to open the database with the RESETLOGS option. Because of this situation, Oracle Database supports trial recovery. A trial recovery applies redo in a way similar