Chinaunix首页 | 论坛 | 博客
  • 博客访问: 579353
  • 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

2019-03-18 13:36:14

79、Which statement is true about transactions?

A. A set of Data Manipulation Language (DML) statements executed in a sequence ending with a SAVEPOINT forms a single transaction.

B. Each Data Definition Language(DDL) statement executed forms a single transaction.

C. A set of DDL statements executed in a sequence ending with a COMMIT forms a single transaction.

D. A combination of DDL and DML statements executed in a sequence ending with a COMMIT forms a single transaction.

Correct Answer: B

Section: (none) Explanation:每个DDL语句都是一个事务,因为DDL语句执行后自动提交。如果A答案SAVEPOINT改为COMMIT或者ROLLBACK那么就是正确的。

阅读(1592) | 评论(0) | 转发(0) |
给主人留下些什么吧!~~