Dba

Oracle Database Export and Import to Gzip Through a Named Pipe When you need to export a large Oracle database but do not have enough disk space for a full uncompressed dump file, piping the export directly through gzip using a Unix named pipe is a proven technique. This method compresses data on the fly, producing a …

List Backup of Archivelog All: Oracle RMAN Command Guide Purpose The LIST BACKUP OF ARCHIVELOG ALL command in Oracle Recovery Manager (RMAN) displays all existing backups of archived redo log files stored in the RMAN repository. This command helps database administrators track and manage archived log backups, verify …

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 Database Backup Commands Guide Oracle Recovery Manager (RMAN) is the primary tool for backing up and recovering Oracle databases, offering automated backup operations with built-in compression, encryption, and validation capabilities. This guide covers essential RMAN backup commands for hot backups, cold …

How to Create Oracle RMAN Recovery Catalog Step by Step Purpose The Oracle Recovery Manager (RMAN) recovery catalog is a dedicated database schema that stores metadata about backup and recovery operations for one or more target databases. This script demonstrates how to create a recovery catalog by establishing a …

How to Check Oracle Database Role Using V$DATABASE View Purpose The SQL query SELECT database_role FROM v$database is a fundamental Oracle Database command used to determine the current operational role of a database instance. This query is essential for Database Administrators (DBAs) working with Oracle Data Guard …

Oracle Data Guard Standby Database Startup Commands Oracle Data Guard standby database startup commands enable database administrators to initialize and maintain physical standby databases that provide disaster recovery and high availability for production systems. These three essential commands work together to bring …

How to Remove an Oracle AWR Baseline Using DROP_BASELINE Purpose The DROP_BASELINE procedure removes a previously-defined AWR (Automatic Workload Repository) baseline from an Oracle database. This command is essential for database administrators who need to conserve storage space by deleting unused or outdated …

List All Oracle AWR Baselines Using DBA_HIST_BASELINE This SQL script retrieves all AWR baselines stored in an Oracle Database, displaying critical information about each baseline including its identifier, name, and associated snapshot range. AWR baselines preserve specific periods of database performance statistics …

How to Check Oracle AWR Snapshot Interval and Retention Settings using table dba_hist_wr_control Purpose The Oracle Database Automatic Workload Repository (AWR) is a critical component for performance monitoring and database tuning that automatically collects and stores performance statistics at regular intervals. This …