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WGU C170 Data Management Applications
Questions and Answers (100% Correct
Answers) Already Graded A+
AREAAns: In DB2, a named section of permanent storage space that is
reserved to store the database.
associative entityAns: See composite entity.
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bridge entityAns: See composite entity.
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candidate keyAns: A minimal superkey; that is, a key that does not
contain a subset of attributes that is itself a superkey. See key.
closureAns: A property of relational operators that permits the use of
relational algebra operators on existing tables (relations) to produce
new relations.
composite entityAns: An entity designed to transform an M:N relationship
into two 1:M relationships. The composite entity's primary key comprises
at least the primary keys of the entities that it connects. Also known as a
bridge entity or associative entity. See also linking table.
composite keyAns: A multiple-attribute key.
dependentAns: An attribute whose value is determined by another
attribute.
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determinationAns: The role of a key. In the context of a database table,
the statement "A determines B" indicates that knowing the value of
attribute A means that the value of attribute B can be looked up.
DIFFERENCEAns: In relational algebra, an operator used to yield all rows
from one table that are not found in another union-compatible table.
DIVIDEAns: In relational algebra, an operator that answers queries about
one set of data being associated with all values of data in another set of
data.
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domainAns: In data modeling, the construct used to organize and
describe an attribute's set of possible values.
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entity integrityAns: The property of a relational table that guarantees
each entity has a unique value in a primary key and that the key has no
null values.
equijoinAns: A join operator that links tables based on an equality
condition that compares specified columns of the tables.
flagsAns: Special codes implemented by designers to trigger a required
response, alert end users to specified conditions, or encode values. Flags
may be used to prevent nulls by bringing attention to the absence of a
value in a table.
foreign key (FK)Ans: An attribute or attributes in one table whose values
must match the primary key in another table or whose values must be
null. See key.
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full functional dependenceAns: A condition in which an attribute is
functionally dependent on a composite key but not on any subset of the
key.
functional dependenceAns: Within a relation R, an attribute B is
functionally dependent on an attribute A if and only if a given value of
attribute A determines exactly one value of attribute B. The relationship
"B is dependent on A" is equivalent to "A determines B," and is written as
A B.
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homonymsAns: The use of the same name to label different attributes.
Homonyms generally should be avoided. Some relational software
automatically checks for homonyms and either alerts the user to their
existence or automatically makes the appropriate adjustments. See also
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synonym.
indexAns: An ordered array of index key values and row ID values
(pointers). Indexes are generally used to speed up and facilitate data
retrieval. Also known as an index key.
index keyAns: See index.
inner joinAns: A join operation in which only rows that meet a given
criterion are selected. The join criterion can be an equality condition
(natural join or equijoin) or an inequality condition (theta join). The inner
join is the most commonly used type of join. Contrast with outer join.
INTERSECTAns: In relational algebra, an operator used to yield only the
rows that are common to two union-compatible tables.
1
WGU C170 Data Management Applications
Questions and Answers (100% Correct
Answers) Already Graded A+
AREAAns: In DB2, a named section of permanent storage space that is
reserved to store the database.
associative entityAns: See composite entity.
© 2026 Assignment Expert
bridge entityAns: See composite entity.
Guru01 - Stuvia
candidate keyAns: A minimal superkey; that is, a key that does not
contain a subset of attributes that is itself a superkey. See key.
closureAns: A property of relational operators that permits the use of
relational algebra operators on existing tables (relations) to produce
new relations.
composite entityAns: An entity designed to transform an M:N relationship
into two 1:M relationships. The composite entity's primary key comprises
at least the primary keys of the entities that it connects. Also known as a
bridge entity or associative entity. See also linking table.
composite keyAns: A multiple-attribute key.
dependentAns: An attribute whose value is determined by another
attribute.
,For Expert help and assignment handling,
2
determinationAns: The role of a key. In the context of a database table,
the statement "A determines B" indicates that knowing the value of
attribute A means that the value of attribute B can be looked up.
DIFFERENCEAns: In relational algebra, an operator used to yield all rows
from one table that are not found in another union-compatible table.
DIVIDEAns: In relational algebra, an operator that answers queries about
one set of data being associated with all values of data in another set of
data.
© 2026 Assignment Expert
domainAns: In data modeling, the construct used to organize and
describe an attribute's set of possible values.
Guru01 - Stuvia
entity integrityAns: The property of a relational table that guarantees
each entity has a unique value in a primary key and that the key has no
null values.
equijoinAns: A join operator that links tables based on an equality
condition that compares specified columns of the tables.
flagsAns: Special codes implemented by designers to trigger a required
response, alert end users to specified conditions, or encode values. Flags
may be used to prevent nulls by bringing attention to the absence of a
value in a table.
foreign key (FK)Ans: An attribute or attributes in one table whose values
must match the primary key in another table or whose values must be
null. See key.
, For Expert help and assignment handling,
3
full functional dependenceAns: A condition in which an attribute is
functionally dependent on a composite key but not on any subset of the
key.
functional dependenceAns: Within a relation R, an attribute B is
functionally dependent on an attribute A if and only if a given value of
attribute A determines exactly one value of attribute B. The relationship
"B is dependent on A" is equivalent to "A determines B," and is written as
A B.
© 2026 Assignment Expert
homonymsAns: The use of the same name to label different attributes.
Homonyms generally should be avoided. Some relational software
automatically checks for homonyms and either alerts the user to their
existence or automatically makes the appropriate adjustments. See also
Guru01 - Stuvia
synonym.
indexAns: An ordered array of index key values and row ID values
(pointers). Indexes are generally used to speed up and facilitate data
retrieval. Also known as an index key.
index keyAns: See index.
inner joinAns: A join operation in which only rows that meet a given
criterion are selected. The join criterion can be an equality condition
(natural join or equijoin) or an inequality condition (theta join). The inner
join is the most commonly used type of join. Contrast with outer join.
INTERSECTAns: In relational algebra, an operator used to yield only the
rows that are common to two union-compatible tables.
