【OCP-12c】CUUG 071題庫考試原題及答案解析(20)
阿新 • • 發佈:2019-02-19
str ann 考試 lte info can select ima 數據 20.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 行出現錯誤:
ORA-01754: 表只能包含一個 LONG 類型的列。
答案 D:
SQL> select * from sales
2 order by emp_image;
select * from sales
*
第 1 行出現錯誤:
ORA-00997: 非法使用 LONG 數據類型
)
【OCP-12c】CUUG 071題庫考試原題及答案解析(20)