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Introduction to Database System

Introduction to Database System
Keys made up of two or more attributes are called composite keys.

False
True

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Introduction to Database System
When you have finished entering information into a form

All of the listed here
the contents of the form are written to the data file
the template is written to the data file
the contents of the form can be printed

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Introduction to Database System
A compound key

is made up a several pieces of information
both (a) and (b)
is a combination of each unique key
None of these
uniquely identifies an item in a list

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Introduction to Database System
Which of the following is true of a network structure?

It will be the dominant data base of the future
It is a physical representation of the data
It is conceptually simple
It allows a many-to-many relationship

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Introduction to Database System
In SQL, which command is used to changes data in a table?

UPDATE
APPEND
INSERT
BROWSE

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Introduction to Database System
A scheme describes

All of these
data elements
None of these
records and files
record relationships

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