{リカバリ}パスワード暗号化したバックアップを用いてリカバリ

https://docs.oracle.com/cd/E82638_01/bradv/configuring-rman-client-advanced.html#GUID-8D85E7DF-53FE-4AF8-811B-CA836B737B36

rman target /

show all;
SET ENCRYPTION IDENTIFIED BY oracle only;
delete noprompt backup;
backup database plus archivelog delete input;
select * from v$backup_piece;

shutdown immediate;
startup mount;
SET decryption IDENTIFIED BY oracle;
restore database;
recover database;
alter database open;