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交易成本门(Transaction cost）
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Which method would you use to undo the changes made by a particular transaction without affecting the changes made by other transactions?（）A、point-in-time recoveryB、execute the ROLLBACK command with transaction numberC、flashback the database to before the transaction was committedD、determine all the necessary undo SQL statements from FLASHBACK_TRANSACTION_QUERY and use them for recovery
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单选题Which method would you use to undo the changes made by a particular transaction without affecting the changes made by other transactions？（）A
point-in-time recoveryB
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determine all the necessary undo SQL statements from FLASHBACK_TRANSACTION_QUERY and use them for recovery
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单选题Which of the following describes how a distributed resumable transaction behaves？（）A
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The resumable setting for the initiating instance determines the resumable conditions for the entire distributed transaction.C
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