Chinaunix首页 | 论坛 | 博客
  • 博客访问: 495950
  • 博文数量: 449
  • 博客积分: 0
  • 博客等级: 民兵
  • 技术积分: 4546
  • 用 户 组: 普通用户
  • 注册时间: 2018-07-05 13:59
个人简介

ocp考试资料群:569933648 验证码:ocp OCP 12c 19c考试题库解析与资料群:钉钉群号:35277291

文章分类

全部博文(449)

文章存档

2023年(1)

2021年(151)

2020年(37)

2019年(222)

2018年(38)

我的朋友

分类: Oracle

2018-07-13 10:12:02

11、Which three are true about UNDO data?

A) It is used to roll back failed transactions.

B) It is used to rewind a database by using FLASHBACK DATABASE.

C) It is used to recover dropped tables by using FLASHBACK TABLE … TO BEFORE DROP.

D) It is used to enable ROLLBACK statements to roll back uncommitted updates.

E) It is used to provide read consistency.

F) It is used during online backups to guarantee their consistency.

Answer:ADE

阅读(563) | 评论(0) | 转发(0) |
给主人留下些什么吧!~~