100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
Previously searched by you
2024 update| WGU D427 DATA MANAGEMENT APPLICATIONS OA EXAM |COMPLETE MOST TESTED QUESTIONS AND VERIFIED ANSWERS | (100% correct solutions)|GET IT A+ RIGHT!!$15.99
Add to cart
2024 Update| WGU D427 DATA MANAGEMENT APPLICATIONS
2024 update| WGU D427 DATA MANAGEMENT APPLICATIONS
Exam (elaborations)
2024 update| WGU D427 DATA MANAGEMENT APPLICATIONS OA EXAM |COMPLETE MOST TESTED QUESTIONS AND VERIFIED ANSWERS | (100% correct solutions)|GET IT A+ RIGHT!!
2024 update| WGU D427 DATA MANAGEMENT APPLICATIONS
Institution
2024 Update| WGU D427 DATA MANAGEMENT APPLICATIONS
2024 update|
WGU D427 DATA MANAGEMENT APPLICATIONS OA EXAM
|COMPLETE MOST TESTED QUESTIONS AND VERIFIED ANSWERS | (100% correct solutions)|GET IT A+ RIGHT!!
2. Name the three parts of a data- data structures, operations, and rules
base model
3. Data structures that prescribe
how data is organized.
Operations that manipulate data
structures.
Rules that govern valid data.
4. A database model based on a relational model
tabular data structure that repre-
sents a collection of related ta-
bles.
5. A relational database is a type of Data is typically structured across mul-
database that organizes data into tiple tables, which can be joined togeth-
rows and columns, which collec- er via a primary key or a foreign key.
tively form a table where the data These unique identifiers demonstrate
points are related to each other. the different relationships which exist
between tables, and these relationships
are usually illustrated through different
types of data models.
6. Characterized by unprecedented big data
data volumes and rapidly chang-
ing data structures.
7. Unordered collection of elements set
enclosed in braces. Ex: {a, b, c}
and {c, b, a} are the same, since tuple
sets are not ordered.
Ordered collection of elements
enclosed in parentheses. Ex: (a, b,
, Data Management Applications (D427)
c) and (c, b, a) are different, since
tuples are ordered.
8. Has a name, a fixed tuple of table
columns, and a varying set of
rows. column
Has a name and a data type. row
Has an unnamed tuple of values. data type
Each value corresponds to a col-
umn and belongs to the column's
data type
Is a named set of values, from
which column values are drawn.
9. Table - relation - file
column - attribute - field
row - tuple - record
data type - domain - data type
10. Selects a subset of rows of a table select
11. Eliminates one or more columns project
of a table.
12. Lists all combinations of rows of product
two tables.
13. Combines two tables by compar- join
ing related columns.
14. Selects all rows of two tables. union
15. Selects rows common to two ta- intersect
bles.
16. Selects rows that appear in one difference
table but not another.
, Data Management Applications (D427)
17. Changes a table name. rename
18. Computes functions over multi- aggregrate
ple table rows, such as sum and
count.
19. Name the three relational opera- Select, project, and union
tions
20. What is the result of a relational table
operation?
21. Are part of the relational model relational rules
and govern data in every relation-
al database. Unique primary key. All tables have
a primary key column, or group of
columns, in which values may not re-
peat.
Unique column names. Different
columns of the same table have differ-
ent names.
No duplicate rows. No two rows of the
same table have identical values in all
columns.
22. Based on business policy and business rules
specific to a particular database.
Ex: All rows of the Employee table
must have a valid entry in the
DepartCode column. Ex: Passport
Number values may not repeat in
different Employee rows.
23. 1.2 SQL SQL
A high-level computer language
for storing, manipulating, and re-
trieving data.
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 CodedNurse. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
