Chinaunix首页 | 论坛 | 博客
  • 博客访问: 579894
  • 博文数量: 487
  • 博客积分: 0
  • 博客等级: 民兵
  • 技术积分: 4916
  • 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(487)

文章存档

2023年(37)

2021年(151)

2020年(37)

2019年(222)

2018年(38)

我的朋友

分类: Oracle

2019-07-24 14:14:13

  Examine these commands and their output:

  SQL> SELECT * FROM emp;

  ENO ENAME

  --- -------

  100 Adam

  101 Alan

  SQL> INSERT INTO emp VALUES(102,'Ben');

  1 row created.

  SQL>COMMIT;

  Commit completed.

  SQL>UPDATE emp SET ename='Bryan' WHERE eno=102;

  1 row updated.

  A power failure occurs. The instance is restarted and this query is executed.

  SQL>SELECT ename FROM emp;

  What is the outcome?

  A)Only Adam and Alan are displayed.

  B)No rows are returned.

  C)Only Adam, Alan, and Bryan are displayed.

  D)Adam, Alan, Ben, and Bryan are displayed.

  E)Only Adam, Alan, and Ben are displayed.

  Answer: E

  解析:UPDATE 语句没有提交

阅读(575) | 评论(0) | 转发(0) |
给主人留下些什么吧!~~