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Introduction to Database System

Introduction to Database System
Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:

A →
A →
A → (B,C).
(B,C) →

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Introduction to Database System
The relational database model was created by E.F. Codd.

True
False

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Introduction to Database System
In SQL, the CREATE VIEW command is used

to define a view of one or more tables or views
to recompile a table
to create a trigger
to recompile view

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Introduction to Database System
An Enterprise Resource Planning application is an example of a(n) ________ .

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

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Introduction to Database System
The designer of a form includes

both (a) and (b)
None of these
data
filed designators
prompts

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Introduction to Database System
Relationship classes are associations between entity classes.

False
True

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