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Introduction to Database System

Introduction to Database System
A report generator is used to

update files
print files on paper
all of the listed here
data entry

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Introduction to Database System
In the relational model, relationships between relations or tables are created by using:

determinants.
composite keys.
foreign keys.
candidate keys.

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Introduction to Database System
An application where only one user accesses the database at a given time is an example of a(n) ________ .

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

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Introduction to Database System
Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?

Strong entity
ID-independent entity
Weak entity
ID-dependent entity

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Introduction to Database System
To have a file hold a list, it is necessary to

All of the listed here
identify the name, width and type of the fields of each record.
decide which fields will be used as sort or index keys
identify the records in the list

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Introduction to Database System
Queries to a database

both (a) and (b)
can use aggregate functions like SUM and COUNT
are written in English
None of these
All of these

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