Exam (elaborations)
WGU C170 Chapter 1 2024 With Complete Solutions Latest Update
- Course
- Institution
WGU C170 Chapter 1 2024 With Complete Solutions Latest Update
[Show more]
Seller
Follow
Schoolflix
Reviews received
Content preview
WGU C170 Chapter 1 2024 With CompleteSolutions Latest Update
AREA - correct answers In DB2, a named section of permanent storage space that
is reserved to store the database.
associative entity - correct answers See composite entity.
bridge entity - correct answers See composite entity.
candidate key - correct answers A minimal superkey; that is, a key that does not
contain a subset of attributes that is itself a superkey. See key.
closure - correct answers A property of relational operators that permits the use
of relational algebra operators on existing tables (relations) to produce new
relations.
composite entity - correct answers 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 key - correct answers A multiple-attribute key.
dependent - correct answers An attribute whose value is determined by another
attribute.
, determination - correct answers 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.
DIFFERENCE - correct answers In relational algebra, an operator used to yield all
rows from one table that are not found in another union-compatible table.
DIVIDE - correct answers 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.
domain - correct answers In data modeling, the construct used to organize and
describe an attribute's set of possible values.
entity integrity - correct answers 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.
equijoin - correct answers A join operator that links tables based on an equality
condition that compares specified columns of the tables.
flags - correct answers 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.
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 or Stuvia-credit 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 Schoolflix. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76658 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now