Answer / guest

Cause: 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.

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

Please add more information about this Error

ORA-12487: clearance labels not between DBHIGH and DBLOW

1 Answers  

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ORA-12623: TNS:operation is illegal in this state

1 Answers  

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PLS-00520: MAP methods must be declared without any parameters other than (optional) SELF.

1 Answers  

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NNL-00803: Queries received, type ALIAS: number

1 Answers  

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NNL-00215: Scheduled specified index number's next auto-refresh to occur in string

1 Answers  

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RMAN-06075: datafile string does not belong to this database

1 Answers  

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RMAN-20503: DELETE cannot delete expired objects - run CROSSCHECK or DELETE EXPIRED

1 Answers  

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ORA-17501: logical block size string is invalid

2 Answers  

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ORA-30754: column or table string stores objects of only one type

1 Answers  

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PLS-00801: internal error [string]

1 Answers  

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ORA-02727: osnpop: access error on orapop executable

1 Answers  

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ORA-04078: OLD and NEW values cannot be identical

1 Answers  

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