Steps to Create a Standby Database in Oracle Data Guard

1. Prepare the Primary Database: Ensure that the primary database is running in ARCHIVELOG mode and is properly configured for Oracle Data Guard.
2. Set Up the Standby Database Environment: Install Oracle software on the standby server, configure the initialization parameters, and create a pfile or spfile for the standby database.
3. Configure Network Connectivity: Ensure that the primary and standby databases can communicate with each other over the network, using static listener configurations if necessary.
4. Copy the Primary Database Files to Standby: Use RMAN to create a backup of the primary database and transfer the backup files to the standby server.
5. Restore and Recover Standby Database: Use RMAN to restore the standby database from the backup files and apply archive logs to bring the standby database up to date with the primary database.
6. Configure Oracle Data Guard Broker: Set up Data Guard configuration using the Broker interface for easier management and monitoring of the standby database.
7. Start Redo Apply on Standby: Start the managed recovery process (MRP) on the standby database to continuously apply changes from the primary database to keep it synchronized.

By following these steps, an Oracle DBA can successfully create a standby database in Oracle Data Guard to ensure data protection and high availability.