To Preview Backups Used in Restore Operations.

The RESTORE PREVIEW can be used to any RESTORE operation to produce a detailed report of every backup to be used in the RESTORE operation.
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Examples:

RESTORE DATABASE PREVIEW;
RESTORE TABLESPACE users PREVIEW;
RESTORE DATAFILE 3 PREVIEW;
RESTORE ARCHIVELOG FROM LOGSEQ 200 PREVIEW;
RESTORE ARCHIVELOG FROM TIME 'SYSDATE-7' PREVIEW;
RESTORE ARCHIVELOG FROM SCN 234546 PREVIEW;

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