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Introduction to Database System

Introduction to Database System
An attribute that names or identifies entity instances is a(n):

entity.
identifier.
attribute.
relationship.

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

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

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Introduction to Database System
One of the reasons why OODBMSs have not been widely used for business information systems is that OOP is obsolete.

True
False

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Introduction to Database System
If a piece of data is stored in two places in the database, then

both (a) and (b)
changing the data is one spot will cause data inconsistency
it can be more easily accessed
storage space is wasted
None of these

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Introduction to Database System
An attribute describes the entity's characteristics.

True
False

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Introduction to Database System
The highest level in the hierarchy of data organization is called

database
data file
data record
data bank

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