皮皮学，免费搜题
登录
搜题
【单选题】
View the Exhibit and examine the structure of the EMP table. You executed the following command to add a primary key to the EMP table： ALTER TABLE emp ADD CONSTRAINT emp_id_pk PRIMARY KEY （emp_id） USING INDEX emp_id_idx； Which statement is true regarding the effect of the command？（）A.
The PRIMARY KEY is created along with a new index.
B.
The PRIMARY KEY is created and it would use an existing unique index.
C.
The PRIMARY KEY would be created in a disabled state because it is using an existing index.
D.
The statement produces an error because the USING clause is permitted only in the CREATE TABLE command.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】(1) 试指出普通螺栓联接、螺柱连接和螺钉连接的结构特点,各用在什么场合 ?
【单选题】The committee reported its findings after a thorough investigation.
A.
things that are found
B.
decisions
C.
results of an enquiry
D.
files
【简答题】The missile was about (launch) ______ when an error was found with its control system.
【简答题】影响药物效应的剂型因素包括哪些?
【单选题】Nowhere in nature is aluminum found free, owing to its always ______ with other elements, most commonly with oxygen.
A.
being combined
B.
having combined
C.
to combine
D.
combined
【单选题】He found ___________ hard to finish the work in such a short time.
A.
that
B.
this
C.
it
D.
its
【简答题】欧阳修在《醉翁亭记》中,用排偶句“ , ”,描绘出两幅对比鲜明的画面,准确而生动地写出了琅琊山有晦有明、交替变化的朝暮景象。
【单选题】Scott found_________ difficult to solve the problem.
A.
its
B.
it’s
C.
its’
D.
it was
相关题目：
参考解析：
知识点：
题目纠错 0
发布
