多选题
Which three statements are true about database recovery operations？（）
发布日期：2022-07-07
A
Damaged or lost data files are restored from backups.
B
Redo log file entries are used to roll forward the database.
C
Undo segments are used to roll back any uncommitted transactions.
D
Transactions that were active when the failure occurred are restarted.
E
Transactions that were active when the failure occurred are automatically committed during the recover procedure.
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