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【第2题】OCP认证1Z0-071最新考试题库及答案

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071考试不仅是OCP11g的考试科目,同时也是OCP 12c的考试科目,所以关心071考题的同学有很多,对此我们专门收集整理了近期071考试的原题,并对这些考题进行讲解,希望帮助广大考生顺利通过071考试。

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2.choose two

Examine the description of the EMP_DETAILS table given below:

Which two statements are true regarding SQL statements that can be executed on the EMP_DETAIL table?


A) You cannot add a new column to the table with LONG as the data type.

B) An EMP_IMAGE column can be included in the GROUP BY clause.

C) You can alter the table to include the NOT Nun., constraint on the EMP_IMAGE column.

D) An EMP_IMAGE column cannot be included in the ORDER BY clause.


Answer:AD

(解析:

答案 A:

SQL> alter table sales add emp_info long;

alter table sales add emp_info long *

第 1 行出现错误:

ORA-01754: 表只能包含一个 LONG 类型的列。

答案 D:

SQL> select * from sales

2 order by emp_image;

select * from sales

*

第 1 行出现错误:

ORA-00997: 非法使用 LONG 数据类型

)

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