How to restore database in oracle

There are three ways to recover an Oracle database: Using the RMAN utility: connect to the target database, perform a recovery operation, and then open the database. Use Flashback technology: Check the logs, determine the point in time, initiate a Flashback rollback, and open the database. Use Data Recovery Advisor: Launch the tool, select repair options, and follow the instructions in the wizard.

How to recover Oracle database

Method 1: Using RMAN (Recovery Manager)

RMAN is an Oracle utility used to back up and restore databases. To restore a database using RMAN, perform the following steps:

1. Start RMAN:

   <code>rman target /</code>

2. Connect to the target database:

   <code>connect target /</code>

3. Restore database:

   <code>restore database;</code>

4. Open database:

   <code>alter database open;</code>

Method 2: Using Oracle Flashback Technology

Flashback technology allows you to restore your database to a specific point in time. To restore a database using Flashback technology, perform the following steps:

1. Check the existence of the Flashback log:

   <code>select * from v$flashback_database_log;</code>

2. Determine the point in time to restore:

   <code>select to_timestamp(flashback_time) from v$flashback_database_log;</code>

3. Start Flashback Rollback:

   <code>flashback database to timestamp <time_point>;</code>

4. Open database:

   <code>alter database open;</code>

Method 3: Use Oracle Data Recovery Advisor

Data Recovery Advisor is an Oracle tool that helps you diagnose and repair database problems. To recover a database using Data Recovery Advisor, perform the following steps:

1. Start Data Recovery Advisor:

   <code>oraadrvi</code>

2. Select the Data Recovery tab:
3. Select the "Repair Database" option:
4. Follow the instructions in the wizard.

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