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Introduction to Database System

Introduction to Database System
Database applications are seldom intended for use by a single user.

True
False

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Introduction to Database System
A primary key is a composite key that was selected to be the main identifier for the relation.

False
True

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Introduction to Database System
A _____ database does not use pointers or physical links, but instead finds related records by examining the contents of fields.

Object-Oriented
Network
None of these
Hierarchical
Relational

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Introduction to Database System
A report form

is used during report generation to format data
All of these
appears on the computer monitor during data entry
None of these
both (a) and (b)

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Introduction to Database System
The model for a _____ resembles the hierarchical model in many respects.

Relational database
None of these
Distributed database
Network database
Hierarchical database

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Introduction to Database System
Which command(s) is(are) used to redefine a column of the table in SQL ?

all of the listed here
ALTER TABLE
MODIFY TABLE
DEFINE TABLE

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