V$database

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 …

Set Oracle Flashback Database Retention Target with ALTER SYSTEM Oracle Flashback Database lets you rewind your entire database to a past point in time without a full restore. The command ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET controls how far back in time that rewind can go. What This Command Does The …

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 …

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 List Oracle Statspack Snapshots with SQL Query This Oracle Database query provides a simple way to view all Statspack snapshots stored in your database. Statspack is Oracle's built-in performance monitoring tool that captures database statistics at regular intervals, helping database administrators analyze …