Data Management – Applications Questions and Correct Answers Latest Update, Graded A+
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Course
Data Management Applications
Institution
Data Management Applications
In a relational model, _______
are also used to establish relationships among tables and to ensure the integrity of
the data.
o :## keys
A _____ key can be described as a minimal superkey, a superkey without any
unnecessary attributes.
o :## candidate
A _____ key is defined as a key that ...
Data Management – Applications
Questions and Correct Answers
Latest Update, Graded A+
In a relational model, _______
are also used to establish relationships among tables and to ensure the integrity of
the data.
o :## keys
A _____ key can be described as a minimal superkey, a superkey without any
unnecessary attributes.
o :## candidate
A _____ key is defined as a key that is used strictly for data retrieval purposes.
o :## secondary
_____ logic, used extensively in mathematics, provides a framework in which an
assertion (statement of fact) can be verified as either true or false.
o :## Predicate
_____, also known as RESTRICT, yields values for all rows found in a table that
satisfy a given condition.
Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update
,2|Page : 2024 | Grade A+
o :## Select
Product yields all possible pairs of rows from two tables, also known as the
_________
product.
o :## Cartesian
Proper use of ________ keys is crucial to controlling data redundancy
o :## foreign
A primary key is a(n) ______________
key chosen to be the primary means by which rows of a table are uniquely
identified.
o :## candidate
A _____ is the primary key of one table that has been placed into another table to
create a common attribute.
o :## foreign key
The relational operators have the property of ___________
; that is, the use of relational algebra operators on existing relations (tables)
produces new relations.
o :## closure
Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update
, 3|Page : 2024 | Grade A+
In a database context, a(n) _____ indicates the use of different names to describe
the same attribute.
o :## synonym
_____ relationships cannot be implemented as such in the relational model.
o :## M:N
A(n) _____________________ provides a detailed description of all tables found
within the user/designer-created database.
o :## data dictionary
To be considered minimally relational, the DBMS must support the key relational
operators _____, PROJECT, and JOIN.
o :## Select
A(n) _____ only returns matched records from the tables that are being joined.
o :## inner join
An index key can have multiple _________________
(a composite index).
o :## attributes
In the relational model, _____ are important because they are used to ensure that
each row in a table is uniquely identifiable.
Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update
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