How to back up Oracle database

How to use Oracle to back up the database? Oracle provides several backup options through RMAN and SQL commands: Backup type: Cold backup (database is in OFFLINE state) Hot backup (database is in ARCHIVELOG mode) Incremental backup (only the parts that have changed since the last backup are backed up) Backup method: Use RMAN (Automated Backup and Recovery Tool) Using SQL Commands (Manual Backup) To restore a backup: Use RMAN or SQL commands.

How to use Oracle to back up the database

A variety of backup options are provided in Oracle to meet different needs and Recovery plan. The following are the steps on how to use Oracle to back up a database:

1. Select the backup type

Oracle provides the following backup types:

• Cold backup: The database must be in OFFLINE state.
• Hot backup: The database can be backed up in ARCHIVELOG mode and the database can be kept online.
• Incremental backup: Back up only the parts that have changed since the last backup.

2. Select the backup method

Oracle provides two backup methods:

• Use RMAN (restore Manager): RMAN is an automated backup and recovery tool that simplifies the backup process.
• Use SQL commands: You can use SQL commands to manually back up the database.

3. Use RMAN to back up the database

The steps to use RMAN to back up the database are as follows:

• Connect to the database and start RMAN .
• Create a backup set.
• Specify the location of the backup file.
• Run the backup command.

4. Use SQL command to back up the database

The steps to use SQL command to back up the database are as follows:

• Use BACKUP DATABASE command Create a backup.
• Use the BACKUP TABLESPACE command to back up a specific tablespace.
• Use the BACKUP ARCHIVELOG command to back up archive logs.

5. Restoring the backup

To restore the backup, you can use RMAN or SQL commands.

• Restore the backup using RMAN:

  • Connect to the database and start RMAN.
  • Open the backup set.
  • Restore the database.

• Use the SQL command to restore the backup:

  • Use the RESTORE DATABASE command to restore the database.
  • Use the RESTORE TABLESPACE command to restore a specific tablespace.
  • Use the RECOVER ARCHIVELOG command to restore archive logs.

Tip:

• Before creating a backup, plan your recovery strategy in advance.
• Test backups regularly to ensure they can be restored successfully.
• Store your backups in a safe and easily accessible location.
• Consider using a cloud storage solution to back up your database.

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