多选题Which two operations require undo data？（）Acommitting a transactionBrolling back a transactionCrecovering from failed transactionsDrecording a transaction to redo log filesErolling forward during instance recovery
题目
多选题
Which two operations require undo data？（）
A
committing a transaction
B
rolling back a transaction
C
recovering from failed transactions
D
recording a transaction to redo log files
E
rolling forward during instance recovery
相似考题
参考答案和解析
正确答案：
E,B
解析：
暂无解析