这两年来,OCP的071考试不像以前那么稳定了,总是不断的有新考题出现,增加了071考试的难度,对此,我们对071考试的原题进行了收集,并由专业人员给出了答案,分享给大家。
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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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