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《数据库应用基础-Visual FoxPro 6.0》综合习题十

《数据库应用基础-Visual FoxPro 6.0》综合习题十
《数据库应用基础-Visual FoxPro 6.0》综合习题十

《数据库应用基础-Visual FoxPro6.0》、

综合习题十

一、选择题:(每题2分,共40分)

1.按照数据库的数据类型分类,Visual Foxpro6.0属于()。

A、层次型

B、关系型

C、网状型

D、混合型

2.在下列四个选项中,不属于基本关系运算的是()。

A、联接

B、投影

C、选择

D、排序

3.在下面的数据类型中默认为.F.的是()。

A、数值型

B、字符型

C、逻辑型

D、日期型

4.执行下列命令序列:

A=4

?IIF(A>3,A>3,A<3)

结果为:()。

A、.T.

B、.F.

C、A>3

D、A<3

5.下列函数中函数值为字符型的是()。

A、DATE()

B、TIME()

C、YEAR()

D、DATETIME()6.将内存变量定义为全局变量的Visual Foxpro6.0命令是()。

A、LOCAL

B、PRIV ATE

C、PUBLIC

D、GLOBAL

7.结构化程序设计的三种基本逻辑结构是()。

A、选择结构、循环结构和嵌套结构

B、顺序结构、选择结构和循环结构

C、选择结构、循环结构和模块结构

D、顺序结构、递归结构和循环结构8.下面关于Visual Foxpro6.0数组的叙述中,错误的是()。

A、用DIMENSION和DECLARE都可以定义数组

B、Visual Foxpro6.0只支持一维数组和二维数组

C、一个数组中各个数组元素必须是同一种数据类型

D、新定义数组的各个元素初值为.F.

9.扩展名为.DBC的文件是()。

A、表单文件

B、数据库表文件

C、数据库文件

D、项目文件10.显示数据库结构的命令是()。

A、EDIT

B、MODI STRU

C、LIST STRU

D、BROW

11,把当前数据表文件中“性别”字段(C型)的值全部清除,但仍保留该字段,应当使用命令()。

A、MODI STRU

B、DELETE

C、REPLACE

D、ZAP

12.如果一个班只能有一个班长,而且一个班长不能同时担任其他班的班长,班级和班长两个实体之间的关系是()。

A、一对一关系

B、一对二关系

C、多对多关系

D、一对多关系

13.若要在数据库中的各个数据表之间建立一对多关系,“一方”的关键字段首先必须建立()。

A、主索引

B、候选索引

C、普通索引

D、唯一索引14.下面有关索引的描述正确的是()。

A、生成了索引以后,原来的数据库表文件中记录的物理顺序将被改变

B、索引与数据库表的数据存储在一个文件中

C、创建索引是创建一个指向数据库表文件记录的指针构成的文件

D、使用索引并不能加快对表的查询操作

15.若建立索引的字段值不允许重复,并且一个表中只能创建一个,它应该是()。

A、主索引

B、唯一索引

C、候选索引

D、普通索引

16.一数据库名为STUDENT,要想打开该数据库,应使用的命令是()。

A、OPEN STUDENT

B、OPEN DATA STUDENT

C、USE DATA STUDENT

D、USE STUDENT

17.下面对视图的有关描述正确的是()。

A、可以使用MODI STRU命令修改视图的结构

B、视图不能删除,否则影响原来的数据文件

C、视图是表复制时产生的

D、使用对视图进行查询时必须先打开该视图所在的数据库

18.视图设计器中含有但查询设计器却没有的选项卡是()。

A、筛选

B、排序依据

C、分组依据

D、更新条件

19.使用报表向导定义报表时,定义报表布局的选项是()。

A、列数、方向、字段布局

B、列数、行数、字段布局

C、行数、方向、字段布局

D、列数、行数、方向

20.能够将表单的Visible属性设置为.T.,并使表单成为活动对象的方法是()。

A、Hide

B、Show

C、Release

D、SetFocus

二、填空题:(每空2分,共计20分)

1.用户启动Visual Foxpro6.0后,若要退出Visual Foxpro6.0回到Windows环境,可在命令窗口输入命令。

2.设变量N1=5,N2=10,N3=15,M1=20,M2=25,将所有以字母N开头的变量存入内存变量文件MYFILE.MEM的命令是。3.设已打开表文件GZ.DBF,执行命令INDEX ON 姓名TAG XINGMING,则该索引文件的文件名是。

4.设数据表文件及其索引文件已打开,为了确保指针定位在第三条记录上,应该使用的命令序列是。

5.在表单中确定控件是否有效的属性是。

6.SQL的核心是。

7.若要把项目文件编译成应用程序,可以使用“项目管理器”窗口中的

按钮。

8.在命令窗口中运行程序文件可以使用命令。

9.在应用程序中,用于强制终止循环的控制命令是。10.在过程文件的定义中,每一个过程均以开始。三、阅读程序:(每题5分,共20分)

1.设有表GZQK.DBF,其结构如下:

字段字段名类型宽度小数

1 编号 C 4

2 姓名 C 8

3 性别 C 2

4 工龄N 4 1

5 工资N 7 2

6 职称 C 10

现用命令文件修改职工工资。原则:工龄在20年(含20年)以上的每人增加150元,工龄在20年以下的每人增加100元,请补充程序完整。

USE GEQK

DO WHILE_______ _____

IF工龄>=20

REPLACE 工资WITH 工资+150

ELSE

REPLACE 工资WITH 工资+l00

ENDIF

____ _______

ENDD0

2.下列程序的运行结果是。

STORE 0 TO S

N=20

DO WHILE N>S

S=S+N

N=N-2

ENDD0

?S

3.下列程序运行的结果是。

STORE 2 TO M,N

DO WHILE M<14

M=M+N

N=N+2

ENDDO

?M,N

四、编写程序:(每题10分,共计20分)

1.编程:在“家庭成员管理.DBC”数据库的“stu.dbf”表中,查找并显示所有男职工的记录。

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