How to back up tables in oracle database

Oracle database table backup can be achieved through the following steps: Export table (EXP) Import table (IMP) Other methods include User Data Pump, RMAN Backup and Recovery, and LogMiner. When backing up, you need to pay attention to permissions, database connections, regular backups, backup plans, and safe storage of backup files.

Oracle database table backup

How to back up Oracle database table?

Backing up tables in Oracle database can be achieved through the following steps:

1. Export table (EXP)

<code>exp table_name/password file=table_name.dmp tables=table_name</code>

For example:

<code>exp scott/tiger file=emp.dmp tables=emp</code>

2. Import table (IMP)

<code>imp table_name/password file=table_name.dmp full=y table_exists_action=replace</code>

For example:

<code>imp scott/tiger file=emp.dmp full=y table_exists_action=replace</code>

Other methods:

• User Data Pump: Use the expdp and impdp commands for more flexible and powerful backup.
• RMAN Backup and Recovery (RMAN): Use RMAN tools for incremental and block-level backups, providing greater recoverability.
• LogMiner: Extract data from redo logs for recovery, suitable for historical data recovery.

Backup Notes:

• Make sure you have the required permissions on the table and related objects.
• Maintain database connections during export and import operations.
• Back up regularly to prevent data loss.
• Consider using a backup plan to ensure backup consistency.
• Store backup files in a secure place to prevent unauthorized access.

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