How to use RMANs REPORT command

Report which objects need backup under the currently configured retention policy:

REPORT NEED BACKUP;

Variants:

REPORT NEED BACKUP RECOVERY WINDOW OF 2 DAYS DATABASE SKIP TABLESPACE TBS_2;
REPORT NEED BACKUP TABLESPACE TBS_3; # uses configured retention policy
REPORT NEED BACKUP INCREMENTAL 2; # checks entire database
REPORT NEED BACKUP RECOVERY WINDOW OF 2 DAYS DATABASE DEVICE TYPE SBT;


To identify datafiles affected by an unrecoverable (such as a direct load insert)operation and the type of backup
required to ensure the datafile can be restored from backup:

REPORT UNRECOVERABLE;

Variants:
REPORT OBSOLETE;
REPORT OBSOLETE RECOVERY WINDOW OF 3 DAYS;
REPORT OBSOLETE REDUNDANCY 1;


Lists and display information about the database files:
REPORT SCHEMA;

If you use a recovery catalog:

REPORT SCHEMA AT TIME 'SYSDATE-14'; # schema 14 days ago
REPORT SCHEMA AT SCN 1000; # schema at scn 1000
REPORT SCHEMA AT SEQUENCE 100 THREAD 1; # schema at sequence 100