Chapter 4

A candidate key is an attribute, or combination of attributes, that uniquely identifies a row in a relation.
True
False
A cascading delete removes all records in other tables associated with the record to be deleted.
True
False
A constraint between two attributes is called a(n):
Functional relation
Attribute dependency
Functional dependency
Functional relation constraint
A referential integrity constraint is a rule that maintains consistency among the rows of two relations.
True
False
A functional dependency between two or more nonkey attributes is called a:
Partial functional dependency
Partial nonkey dependency
Transitive dependency
Partial transitive dependency
A primary key is an attribute that uniquely identifies each row in a relation.
True
False
A primary key that consists of more than one attribute is called a:
Foreign key
Composite key
Multivalued key
Cardinal key
A primary key whose value is unique across all relations is called a(n):
Global primary key
Inter-table primary key
Enterprise key
Foreign global key
A relation is in first normal form if it has no more than one multivalued attribute.
True
False
A relation that contains no multivalued attributes and has nonkey attributes solely dependent on the primary key but contains transitive dependencies is in which normal form?
First
Second
Third
Fourth
A rule that states that each foreign key value must match a primary key value in the other relation is called the:
Referential integrity constraint
Key match rule
Entity key group rule
Foreign/primary match rule
A two-dimensional table of data sometimes is called a:
Group
Set
Declaration
Relation
All of the following are the main goals of normalization EXCEPT:
Minimize data redundancy
Simplify the enforcement of referential integrity
Maximize storage space
Make it easier to maintain data
An attribute in a relation of a database that serves as the primary key of another relation in the same database is called a:
Link attribute
Link key
Foreign key
Foreign attribute
An attribute (or attributes) that uniquely identifies each row in a relation is called a:
Column
Foreign field
Primary key
Duplicate key
In the figure below, the primary key for "Order Line" is which type of key?
Composite
Foreign
Standard
Grouped
In the figure below, what type of relationship do the relations depict?
Strong entity/weak entity
One-to-many
Ternary
Many-to-many
The allowable range of values for a given attribute is part of the domain constraint.
True
False
The columns of a relation can be interchanged without changing the meaning or use of the relation.
True
False
The normal form which deals with multivalued dependencies is called:
Fifth normal form
Fourth normal form
Boyce-codd normal form
Sixth normal form
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