Database-Recovery

How to Find the Current SCN in Oracle Database Using DBMS_FLASHBACK What number marks "now" inside an Oracle database? The System Change Number (SCN) does. One call to DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER returns it from any session that has EXECUTE on the package. What Is an SCN? The System Change Number (SCN) is a …

How to Enable Oracle Database Flashback: Shutdown, Mount, and ALTER Commands Oracle Flashback Database is one of the most powerful data protection tools available to a DBA. This guide walks you through the four commands needed to turn on Oracle Flashback — from a clean shutdown to opening the database in flashback …

LIST BACKUPSET OF DATABASE: Oracle RMAN Command Guide Purpose The LIST BACKUPSET OF DATABASE command in Oracle Recovery Manager (RMAN) displays detailed information about all backup sets that contain database datafiles. This command helps database administrators verify backup existence, check backup status, find backup …

Oracle RMAN List Backupset Command Guide Purpose The list backupset; command in Oracle Recovery Manager (RMAN) displays detailed information about backup sets stored in the RMAN repository. This command helps database administrators view backup set metadata, including backup pieces, unique keys, completion times, and …

Oracle RMAN Crosscheck Archivelog - Fix RMAN-06059 Error Purpose The change archivelog all crosscheck command is an Oracle Recovery Manager (RMAN) utility that synchronizes the RMAN repository metadata with the physical reality of archived redo log files. This command specifically resolves the RMAN-06059 error, which …

Oracle RMAN Database Restore and Recovery Guide Purpose A restore that fails at the first step is usually a startup problem, not a backup problem. RMAN needs the instance in the right state for each command. A lost controlfile needs a started instance with no mounted database. A lost datafile needs a mounted database. …

Oracle RMAN Reset Database After RESETLOGS Recovery Purpose In the Oracle 19c documentation, opening a database with RESETLOGS needs no manual step to register the new incarnation. Oracle creates the incarnation record in the recovery catalog and makes it the current incarnation for you. The RESET DATABASE command in …

Register Missing Log File in Oracle Database The ALTER DATABASE REGISTER PHYSICAL LOGFILE command is used to manually register archived redo log files in an Oracle Data Guard environment, specifically for physical standby databases. This command becomes essential when automatic log registration fails or when gaps occur …

How to Cancel Oracle Data Guard Managed Recovery Overview The ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL command stops the Managed Recovery Process (MRP) on an Oracle Data Guard physical standby database. This command is essential when you need to perform maintenance operations, open the database in …

Removing Standby Database Apply Delay in Oracle Data Guard Purpose This script removes the apply delay from an Oracle Data Guard physical standby database. Apply delays are safety features that create a time lag between when redo data arrives at the standby database and when it is applied, protecting against corrupted …