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Introduction to Database System

Introduction to Database System
If you want to organize a file in multiple ways, it is better to _____ the data rather than to sort it.

Delete
Index
None of these
Update
Sort Key

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Introduction to Database System
An-owner-member set in the CODASYL specifications may have

only one owner but many owner occurrences
All of the listed here
more than one member but only one occurrence per member
only one member but many member occurrence

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Introduction to Database System
Entity instances are associated by relationship classes.

False
True

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Introduction to Database System
A report form

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

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Introduction to Database System
In which of the following is a single-entity instance of one type related to many entity instances of another type?

Many-to-Many Relationship
One-to-One Relationship
Composite Relationship
One-to-Many Relationship

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Introduction to Database System
Two files may be joined into a third file if

they have no records with the same value in the common field
they have a field in common
they have a row in common
None of these
both (b) and (c)

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