What is not the recommended kind of email address or screen name according to the passage?A、long name with different letters.B、A long name with different numbers.C、A name with the combination of letters and numbers.D、A name with unusual symbols.

题目

What is not the recommended kind of email address or screen name according to the passage?

A、long name with different letters.

B、A long name with different numbers.

C、A name with the combination of letters and numbers.

D、A name with unusual symbols.

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更多“What is not the recommended kind of email address or screen name according to the pass ”相关问题

  • 第1题：

    从员工信息表中查询姓名为张红的name字段和email字段的语句是【 】。


    正确答案：SELECT name email FROM员工信息WHERE name=“张红”
    SELECT name, email FROM员工信息WHERE name=“张红” 解析：本题考查SQL的简单查询语句。

  • 第2题：

    要在users表中插入1条记录,下面哪条语句是正确的()

    A.InsertIntousers（id，user_namE.Valuee（100，"luhong"）提示：id字段类型自动编号，因此，用户不能赋值

    B.InsertIntousers（real_name，tel）Valuee（"卢红"，"6545632"）提示：user_name是主键必须赋值，但未赋值。

    C.InsertIntousers（user_name，Email）Valuee（"luhong"，""）提示：Email不是必填字段，但应该赋NULL值

    D.InsertIntousers（user_name，Email）Valuee（"luhong"，NULL）


    参考答案：D

  • 第3题：

    BookStore数据库中有客户表Customer（CustomerCode, Name, Sex, Hometown, Email, Telephone, LoginDate, Password) 查询Customer表中所有客户的信息，SQL语句: SELECT ________ FROM Customer

    A.*#B.CustomerCode, Name, Hometown, Sex, Email, Telephone, LoginTime, PassWord#C.CustomerCode, Hometown, Telephone, Name, Sex, Email, LoginTime, PassWord#D.CustomerCode ~ PassWord
    *;CustomerCode，Name，Hometown，Sex，Email，Telephone，LoginTime，PassWord;CustomerCode，Hometown，Telephone，Name，Sex，Email，LoginTime，PassWord

  • 第4题：

    部门DEPT(Deptno，Name，Tel，Leader)和职工EMP(Empno，Name，Sex，Address， Deptno)实体集，若一个职工只能属于一个部门，部门负责人Leader是一个职工。关系 DEPT和EMP的外码分别为(30)；下图中a、b处的实体名分别为(31)。

    A．Deptno、Empno

    B．Name、Deptno

    C．Leader、Deptno

    D．Name、Address


    正确答案：C

  • 第5题：

    10、BookStore数据库中有客户表Customer（CustomerCode, Name, Sex, Hometown, Email, Telephone, LoginDate, Password) 查询Customer表中所有客户的信息，SQL语句: SELECT ________ FROM Customer

    A.*#B.CustomerCode, Name, Hometown, Sex, Email, Telephone, LoginTime, PassWord#C.CustomerCode, Hometown, Telephone, Name, Sex, Email, LoginTime, PassWord#D.CustomerCode ~ PassWord
    LEFT(Name,1)= '刘' OR LEFT(Name,1)= '杨';Name LIKE '刘%' OR Name LIKE '杨%';Name LIKE '[刘,杨]%'

  • 第6题：

    【多选题】BookStore数据库中有客户表Customer（CustomerCode, Name, Sex, Hometown, Email, Telephone, LoginDate, Password) 查询Customer表中所有客户的信息，SQL语句: SELECT ________ FROM Customer

    A.*#B.CustomerCode, Name, Hometown, Sex, Email, Telephone, LoginTime, PassWord#C.CustomerCode, Hometown, Telephone, Name, Sex, Email, LoginTime, PassWord#D.CustomerCode ~ PassWord
    INSERT INTO Publisher VALUES（‘66’，’群众出版社‘，’0321-76584391’）

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