Data Management – Applications Questions and Correct Answers Latest Update, Graded A+
4 views 0 purchase
Module
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
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ExamArsenal. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £10.25. You're not tied to anything after your purchase.
