V$DATAGUARD_CONFIG

V$DATAGUARD_CONFIG displays the unique database names defined with the DB_UNIQUE_NAME and LOG_ARCHIVE_CONFIG initialization parameters, providing a view of the Data Guard environment from any database in the configuration.

The first row of the view lists the unique database name of the current database that was specified with the DB_UNIQUE_NAME initialization parameter. Additional rows reflect the unique database names of the other databases in the configuration that were specified with the DG_CONFIG keyword of the LOG_ARCHIVE_CONFIG initialization parameter.