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C175 WGU Data Management Foundation. 84 Questions and Correct Answers, 100% Correct. 2024/5.
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C175 WGU Data Management Foundation. 84Questions and Correct Answers, 100% Correct.
2024/5.
An associative entity is an element of the entity-relationship model. All relationships for the associative
entity should be many.
Associative Entity
An attribute is a property or characteristic of an entity.
Attribute
A binary relationship is a relationship between two entity types.
Binary relationship
Is any column or a combination of columns that can qualify as unique key in database.
Candidate Key
Cardinality represents the maximum number of entities that can be involved in a particular relationship.
Cardinality
Usually the result of a missing join condition or a method of expanding the data of 1 table by the number
of rows in the second table.
Cartesian product
Will delete all records that reference the primary key
Cascade Delete
Returns a single column of one or more values.
column subquery
When data is encrypted, it is changed, bit by bit or character by character, into a form that looks totally
garbled. It can and must be reconverted, or decrypted, back to its original form to be of use.
data encryption
Is a methodology for organizing attributes into tables so that redundancy among the non-key attributes
is eliminated.
Data normalization
Describes how often stored data is updated.
Data volatility
, Understanding of how much data will be in a database or a table within a database
Data Volume Assessment
A database is a collection of information that is organized so that it can easily be accessed, managed, and
updated.
Database
Data control language is used to control access to data stored in a database.
DCL
Data definition language - involves instructing the DBMS software on what tables will be in the database,
what attributes will be in the tables, which attributes will be indexed, and so forth.
DDL
Definer is a MySQL term where AuthID is the same for another DBMS
Definer
The act of duplicating data in a database for performance or the preservation of historical information
Denormalization
Involves rebuilding an entire information system or significant parts of one after a catastrophic natural
disaster such as a hurricane, tornado, earthquake, building collapse, or even a major fire.
disaster recovery
Data manipulation language refers to the four basic operations that can and must be performed on data
stored in any DBMS: data retrieval, data update, insertion of new records, and deletion of existing
records.
DML
An E-R model is a data model for describing a database in an abstract way.
E-R model
The SELECT command is embedded within the lines of a higher-level language program and functions as
an input or "read" statement for the program.
embedded mode
An entity is an object or event in our environment that we want to keep track of.
Entity
Is a field (or collection of fields) in one table that uniquely identifies a row of another table.
Foreign Key
Used to help a DBMS find data quickly
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