Database-Recovery

How to Find the Current SCN in Oracle Database Using DBMS_FLASHBACK The System Change Number (SCN) is Oracle's internal logical clock. Every DBA needs to know how to read it. This post shows you the simplest SQL query to get the current SCN from any Oracle Database session, and explains exactly why it matters. What Is …

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 This guide provides complete Oracle RMAN (Recovery Manager) scripts for restoring and recovering Oracle databases in different scenarios. These scripts help database administrators perform full database recovery, point-in-time recovery (PITR), and verify …

Oracle RMAN Reset Database After RESETLOGS Recovery Purpose The RESET DATABASE command in Oracle Recovery Manager (RMAN) notifies the recovery catalog that a new database incarnation has been created after opening the database with the RESETLOGS option. This command is essential for maintaining synchronization between …

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 …