多选题
A You must ensure that the SALES database is mounted or open.
B You must restore a backup control file to perform a block media recovery.
C You must take the tools01.dbf data file offline before you start a block media recovery.
D You must put the database in NOARCHIVELOG mode to perform a block media recovery.
E You can perform only a complete media recovery of individual blocks， point-in-time recovery of individual data blocks is not supported.
正确答案
答案解析
略
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