2020年北邮数据库系统原理期中测验答案.pdf

1

2020 Database System Principles

Test One

Class___ _________No_______ _____Name____________

III. A on-line shopping site has a three-tier Browser-Server(B/S) architecture. Its

application programs are programmed in Java, and these programs access

MySQL database server via the ODBC interface.

IV. The relational model is applicable to managing structured data such as the table

data, while XML provides a way to represent semi-structured data, e.g. the data

with nested structures.

A. I, II, III, IV B. I, II, III C. I, II, IV D. II, III, IV

（2）The data model defines the specification of managing data items in database.

It is a collection of conceptual tools for describing data structure, data relationships,

i.e. the data manipulation language and the data definition language (或：DDL)

that is for specifying the database schema and as well as other properties of the data.