The Database Identifier (DBID) is an internal, uniquely generated number that will distinguish the target database from the rest of the databases that have the same name in the recovery catalog. Oracle creates this number automatically when you create the database. The DBID is set while restoring the control file to differentiate the database for which the control file is restored.
Procedure
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From the CommCell Browser, expand Client Computers > client.
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Right-click the instance, point to All Tasks and then click Browse and Restore.
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Select Latest Backup and click View Content.
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Select the databases and click Recover All Selected.
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Select the option for the type of restore operation, and then click Next.
An Oracle restore options dialog box appears.
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On the General tab, click Advanced.
The Advanced Restore Options dialog box is displayed.
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On the Options tab, select the Set DBID check box.
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Click OK.
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Click OK.