皮皮学，免费搜题
登录
搜题
【单选题】
实现中华民族的伟大复兴,关键在:( )A.
关键在人民民主专政
B.
关键在坚持社会主义道路
C.
关键在党
D.
关键在凝聚中国力量
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
【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...
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.
【简答题】使用SQL语句删除“订购单”表的候选索引emp： ALTER TABLE 订购单 ______________TAG emp
【单选题】修改EMP表ENAME字段, ALTER TABLE EMP ENAME nvarchar2(12);
A.
CHANGE
B.
CHANGING
C.
MODIFY
D.
MODIFIED
参考解析：
知识点：
题目纠错 0
发布
