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【071考试】最新OCP认证071考试题库整理-第26题

【071考试】最新OCP认证071考试题库整理-第26题

来源:CUUG培训-优技培训    更新时间:2019/5/23 9:33:05    阅读次数:

071考试题库之前是比较稳定的,但随着Oracle的调整,071考试不断的增加新的考题,增加了考试的难度,所以我们专门收集整理了这些考试,并对这些考题进行解析,希望可以对考生有帮助。

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071考试-第26题、choose two:

You executed the following CREATE TABLE statement that resulted in an error:

SQL> CREATE TABLE employees(

emp_id NUMBER(10) PRIMARY KEY,

ename VARCHAR2(20),

email NUMBER(3) UNIQUE,

address VARCHAR2(500),

phone VARCHAR2 (20),

resume LONG,

hire_date DATE,

remarks LONG,

dept_id NUMBER(3) CONSTRAINT emp_dept_id_fk REFERENCES departments(dept_id) ,

CONSTRAINT ename_nn NOT NULL(ename));

Identify two reasons for the error.

A) The PRIMARY KEY constraint in the EMP_ID column must have a name and must be defined at the table level only.

B) The FOREIGN KEY keyword is missing in the constraint definition.

C) Only one LONG column can be used per table.

D) FOREIGN KEY defined on the DEPT_ID column must be at the table level only.

E) The NOT NULL constraint on the ENAME column must be defined at the column level.

Answer:CE

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