OCI-01531
        a database already open by the instance
        
        
        Cause
        During ALTER DATABASE, an attempt was made to open a database on an instance for which there is already an open database.
        Action
        If you wish to open a new database on the instance, first shutdown the instance and then startup the instance and retry the operation.
        
     
    
    
        OCI-01531
        a database already open by the instance
        
        
        Cause
        During ALTER DATABASE, an attempt was made to open a database on an instance for which there is already an open database.
        Action
        If you wish to open a new database on the instance, first shutdown the instance and then startup the instance and retry the operation.
        
     
    
    
        OCI-01531
        a database already open by the instance
        
        
        Cause
        During ALTER DATABASE, an attempt was made to open a database on an instance for which there is already an open database.
        Action
        If you wish to open a new database on the instance, first shutdown the instance and then startup the instance and retry the operation.