How to recover accidentally deleted data in oracle

Accidentally deleted Oracle data can be recovered using the following methods: Check the Recycle Bin. Use flashback queries to view data for a specific time. Use archive logs for recovery (require archive logs enabled). Contact Oracle Support for advanced recovery options.

How to recover accidentally deleted Oracle data

Accidentally deleted data is a common problem in Oracle. If this happens, immediate steps must be taken to prevent data loss. The following are the steps to recover accidentally deleted data in Oracle:

• Check the recycle bin

There is a recycle bin in Oracle to store deleted data OK. If the data was deleted recently, you can recover it from the Recycle Bin. To do this, use the following query:

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

• Using Flashback Query

Flashback query allows you to view the data in the table at a certain point in time , even if the data has been deleted. To do this, use the following query:

<code class="sql">SELECT * FROM <<TABLE_NAME>> AS OF TIMESTAMP <<TIMESTAMP>>;</code>

• Using archive logs

If archive logs are enabled, data can be recovered from archive logs . To do this, use the following steps:

<code>1. 识别记录删除操作的事务。
2. 使用闪回日志查询来提取该事务的重做日志。
3. 使用 RMAN 将重做日志应用到表中。
</code>

• Contact Oracle Support

If the above method is not successful, you can contact Oracle Support for assistance . They have the tools and resources to recover lost data.

Precautions

To prevent future data loss, please take the following precautions:

• Back up your database regularly.
• Enable auditing to track changes made to the database.
• Use Oracle data protection tools such as Recovery Manager (RMAN).
• Continuous monitoring of the database to detect any issues.

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