大數據就業實戰培訓 Oracle就業實戰培訓
071考試題庫之前是比較穩定的，但隨著Oracle的調整，071考試不斷的增加新的考題，增加了考試的難度，所以我們專門收集整理了這些考試，并對這些考題進行解析，希望可以對考生有幫助。
每周五晚8點，我們有免費的OCP解析公開課，地址：https://ke.qq.com/course/326223 OCP題庫交流群：1015267481，驗證ocp
-------------------------------------------------------
071考試-第26題、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
