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:

SELECT * FROM RECYCLEBIN WHERE ROWID = '<<ROWID>>';

• 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:

SELECT * FROM <<TABLE_NAME>> AS OF TIMESTAMP <<TIMESTAMP>>;

• 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.

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