Examine the command that is used to create a table: SQL> CREATE TABLE orders(oid NUMBER(6) PRIMARY KEY, odate DATE, ccode NUMBER(6), oamt NUMBER(10,2)) TABLESPACE users; Which two statements are true about the effect of the above command) ()
AA CHECK constraint is created on the OID column.
BA NOT NULL constraint is created on the OID column.
CThe ORDERS table is the only object created in the USERS tablespace.
DThe ORDERS table and a unique index are created in the USERS tablespace.
EThe ORDERS table is created in the USERS tablespace and a unique index is created on the OIDcolumn in the SYSTEM tablespace.
下列的URL中,具有身份验证与加密通讯的网站地址是()。
A、http://wenku.baidu.com
B、http://weibo.com
C、http://www.sina.com.cn
D、https://www.linkedin.com
E、http://www.youku.com
下列主要应用于智能型手机、平板计算机、GPS车用导航计算机的操作系统是()。
AAndroid
BWindows 7
CWindows XP
DWindows Mobile
鸡胸和漏斗胸多见于()
A、3~4个月
B、3~6个月
C、8~9个月
D、1岁左右
E、3岁以后
简述S330设备背板总线槽位业务容量。
已知Value是一个类,value是Value的一个对象。下列以非成员函数形式重载的运算符函数原形中,正确的是( )。
A、Value operator+(Value v,int i);
B、Value operator+(Value v=value,int i);
C、Value operator+(Value v ,int i=0);
D、Value operator+(Value v=value,int i=0);