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Introduction to Database System

Introduction to Database System
A subtype entity is a special case of another entity called a supertype entity.

False
True

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Introduction to Database System
A ____ Contains the smallest unit of meaningful data, so you might call it the basic building block for a data file.

Database
Records
Fields
File structure

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Introduction to Database System
Which of the following is not characteristic of a relational database model?

tables
treelike structure
complex logical relationships
records

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Introduction to Database System
An on-line commercial site such as Amazon.com is an example of a(n) ________ .

single-user database application
data mining database application
e-commerce database application
multiuser database application

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Introduction to Database System
A file produced by a spreadsheet

is generally stored on disk in an ASCII text format
can be used as it by the DBMS
all of the listed here
can be used for graphic

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Introduction to Database System
The _____ command is used to allocates an extent for the table in SQL

MODIFY TABLE
ALTER TABLE
None of these
REDEFINE TABLE
MODIFY ALLOCATES

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