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Introduction to Database System

Introduction to Database System
An operation that will increase the length of a list is

Insert
Look-up
Modify
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Introduction to Database System
Which type of entity represents an actual occurrence of an associated generalized entity?

Supertype entity
Archetype entity
Instance entity
Subtype entity

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Introduction to Database System
A file produced by a spreadsheet

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

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Introduction to Database System
A functional dependency is a relationship between or among:

relations.
rows.
attributes.
tables.

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Introduction to Database System
A computer file contains several records. What does each record contain?

Bytes
Words
Fields
Database

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Introduction to Database System
An audit trail

is the recorded history of operations performed on a file
is used to make back-up copies
can be used to restore lost information
All of the listed here

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