How to recover accidentally deleted oracle data

Oracle provides a variety of accidentally deleted data recovery methods: recovery from the recycle bin (available within 30 days); use flashback query (recovery at a specific point in time); recovery from backup (backup must be timely); use Third-party tools (more advanced). Precautions: Back up regularly, use the recycle bin, enable audit trails, test recovery plans.

Oracle Data Accidentally Deleted Recovery Guide

Question: What to do after Oracle data is accidentally deleted recover?

Answer: Oracle provides several methods to recover accidentally deleted data:

Method 1: Recover from the Recycle Bin

• If the accidentally deleted data is within 30 days, you can use the Recycle Bin function to recover it.
• Connect to the database and execute the following query:

<code class="sql">SELECT * FROM RECYCLEBIN;</code>

• Find the data you want to recover, then execute the following query:

<code class="sql">RESTORE TABLE <table_name> FROM RECYCLEBIN;</code>

Method 2: Use flashback query

• If there is no data in the recycle bin, you can use the flashback query function to restore it.
• Connect to the database and execute the following query:

<code class="sql">SELECT * FROM <table_name> AS OF <timestamp>;</code>

• where is a specific point in time before the data was deleted.

Method 3: Restore from Backup

• If neither Recycle Bin nor Flashback Query are available, you can restore data from backup.
• Make sure there is no backup before accidentally deleting data.
• Recover using the Oracle Recovery (RMAN) utility or Recovery Manager (RMAN) commands.

Method 4: Use third-party tools

• There are many third-party tools that can be used to recover Oracle data, such as Oracle Data Recovery Advisor or Quest Toad for Oracle.
• These tools typically provide more advanced recovery capabilities and automation.

Precautions:

To prevent data loss, it is recommended to take the following precautions:

• Back up the database regularly.
• Use the Recycle Bin function to store deleted data.
• Enable audit trails to track database activity.
• Test recovery plans regularly to ensure their effectiveness.

The above is the detailed content of How to recover accidentally deleted oracle data. For more information, please follow other related articles on the PHP Chinese website!