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    Oracle Error ORA-01530: a database already mounted by the instance

    admin November 15, 2022 No Comments

    Oracle Error Message

    ORA-01530: a database already mounted by the instance

    Reason for the Error

    During ALTER DATABASE MOUNT, an attempt is being made to mount a database on an instance in which a database is or has previously been mounted.

    Solution

    If you wish to mount the database, shutdown the instance and then startup the instance and retry the operation.

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