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Introduction to Database System

Introduction to Database System
A report generator is used to

update files
print files on paper
all of the listed here
data entry

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Introduction to Database System
If attribute A determines both attributes B and C, then it is also true that:

B →
(B,C) →
C →
A →

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Introduction to Database System
A minimum cardinality is the minimum number of entity instances that may participate in a relationship instance.

True
False

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Introduction to Database System
A relation is a two-dimensional table.

True
False

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Introduction to Database System
For some relations, changing the data can have undesirable consequences called:

transitive dependencies.
referential integrity constraints.
modification anomalies.
normal forms.

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Introduction to Database System
In a one-to-many relationship, the entity that is on the many side of the relationship is called a(n) ________ entity.

parent
child
instance
subtype

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