试题详情
- 单项选择题 有如下三步操作,并且均成功执行,请选择结果() delete from emp; alter table emp add(addr varchar2(40)); rollback;
A、emp表中数据处于回滚段中
B、emp表中的数据被永久删除
C、emp表中的数据没有变化
D、原来的emp表中的数据被添加到新emp表中
E、以上所述都不正确
- B
关注下方微信公众号,在线模考后查看
热门试题
- In your production
- 在Oracle中,用户()拥有所有内置的
- You have not configu
- By default,
- In your d
- You work
- You have the follow
- You performed&
- Integration be
- You backed&ens
- Given that t1 is a r
- A junior
- You administer
- You installed&
- You issued&ens
- You discover that y
- Your boss̳
- The CUSTOMERS table
- User SCOTT&ens
- What are three actio