考试
2021-02-25 12:22:57

(多选题)Which two&#

题目描述

AMultiple transactions can use the same undo segment.

BA transaction is assigned an undo segment when it is started.

CMore than one transaction cannot share the same extent in the undo tablespace.

DThe transactions use system undo segment to store undo data if all the segments in the undo tablespaceare used.

答案解析

[db:答案解析]

A,B

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