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Introduction to Database System

Introduction to Database System
An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

True
False

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Introduction to Database System
A recursive relationship is a relationship between an entity and ________ .

itself
an instance entity
an archetype entity
a subtype entity

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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
In SQL, GRANT command is used to

grant system privileges, roles, and object privileges to uses and roles
allow user to create databases
None of the listed here
allow user to access databases

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Introduction to Database System
The distinguishable parts of a record are called

database
fields
files
None of these
data

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Introduction to Database System
When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n):

referential integrity constraint.
transitive dependency.
normal form.
insertion anomaly.

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