how many database register in Recovery Catalog Views

All of the information that we can see in RMAN prompt by SHOW, LIST or REPORT command can also be easily seen by query recovery catalog views. Recovery catalog views are prefixed by RC_.

Most of the catalog views have a corresponding dynamic performance view (or V$view) in the database server. For example, RC_BACKUP_PIECE corresponds to V$BACKUP_PIECE. The primary difference between the recovery catalog view and corresponding server view is that each catalog view contains information about all the databases registered in the catalog, whereas the database server view contains information only about itself.

How to Find DB_KEY and DBID from Recovery Catalog View?
------------------------------------------------------------
SQL> conn catalog_user/catalog_pwd@netservice_name_of_recovery_catalog
Connected.
SQL> SELECT DB_KEY,DBID,NAME,RESETLOGS_TIME FROM RC_DATABASE;

DB_KEY DBID NAME RESETLOGS
---------- ---------- -------- ---------
88 1509380669 DBASE 06-MAY-08

Determining the Schema Version of the Recovery Catalog
------------------------------------------------------------
SQL> SELECT * FROM rcver;

VERSION
------------
10.02.00.00


You can query RC_BACKUP_SET,RC_BACKUP_CONTROLFILE,RC_BACKUP_DATAFILE,RC_BACKUP_CORRUPTION,
RC_STORED_SCRIPT,RC_BACKUP_FILES views as of your interest.

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