WGU D426 Data Management Foundations OA | High-
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Database Application
ANSWER:
Software that helps business users interact with database systems.
Database Administrator
ANSWER:
Responsible for securing the database system against unauthorized users. A
database administrator enforces procedures for user access and database
system availability.
Authorization
ANSWER:
Many database users should have limited access to specific tables, columns, or
rows of a database. Database systems authorize individual users to access
specific data.
Rules
ANSWER:
Database systems ensure data is consistent with structural and business rules.
Query Processor
ANSWER:
Interprets queries, creates a plan to modify the database or retrieve data, and
returns query results to the application. Performs query optimization to ensure
the most efficient instructions are executed on the data.
Storage Manager
,ANSWER:
Translates the query processor instructions into low-level file-system commands
that modify or retrieve data. Database sizes range from megabytes to many
terabytes, so the storage manager uses indexes to quickly locate data.
Transaction Manager
ANSWER:
Ensures transactions are properly executed. The transaction manager prevents
conflicts between concurrent transactions. The transaction manager also
restores the database to a consistent state in the event of a transaction or
system failure.
Metadata
ANSWER:
Data about the database, such as column names and the number of rows in each
table.
Relational Database
ANSWER:
Stores data in tables, columns, and rows, similar to a spreadsheet.
Relational Database
ANSWER:
All Relational Database systems support the SQL query language.
Relational Database
ANSWER:
Relational systems are ideal for databases that require an accurate record of
every transaction, such as banking, airline reservation systems, and student
records.
MongoDB (NoSQL)
ANSWER:
The newer non-relational systems are called NoSQL, for 'not only SQL', and are
optimized for big data.
SQL Statements
,ANSWER:
INSERT inserts rows into a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
CREATE TABLE (Statement)
ANSWER:
A statement that creates a new table by specifying the table and column names.
Each column is assigned a data type that indicates the format of column values.
Data types can be numeric, textual, or complex.
Data Type
ANSWER:
INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Database Design
ANSWER:
Analysis
Logical design
Physical design
Analysis Phase, Conceptual Design, Entity-Relationship Modeling (Database
Design)
ANSWER:
This phase specifies database requirements without regard to a specific
database system. Requirements are represented as entities, relationships, and
attributes. An entity is a person, place, activity, or thing. A relationship is a link
between entities, and an attribute is a descriptive property of an entity.
Logical Design (Database Design)
ANSWER:
, This phase implements database requirements in a specific database system.
For relational database systems, Logical design converts entities, relationships,
and attributes into tables, keys, and columns.
Physical Design
ANSWER:
Specifies indexes, table structures, and partitions. This phase adds indexes and
specifies how tables are organized on storage media. Affects query processing
speed but never affects the query result.
Data Independence
ANSWER:
Allows database designers to tune query performance without changes to
application programs.
Application Programming Interface (API)
ANSWER:
To simplify the use of SQL with a general-purpose language, database programs
typically use an
Application Programming Interface(API)
MySQL Command-Line Client
ANSWER:
A text interface included in the MySQL Server download.
MySQL
ANSWER:
'World' database, a database that is usually installed with My SQL
Error Code
ANSWER:
MySQL Server returns an Error Code and description when an SQL statement is
syntactically incorrect or the database cannot execute the statement.
Database Model
ANSWER:
Yield Questions & Answers,& Study Guide | Frequently
Most Tested Questions |100% Guarantee Pass and
Accurate | Well Verified and Updated | Latest Exam
and Brand New Version!!!!
Database Application
ANSWER:
Software that helps business users interact with database systems.
Database Administrator
ANSWER:
Responsible for securing the database system against unauthorized users. A
database administrator enforces procedures for user access and database
system availability.
Authorization
ANSWER:
Many database users should have limited access to specific tables, columns, or
rows of a database. Database systems authorize individual users to access
specific data.
Rules
ANSWER:
Database systems ensure data is consistent with structural and business rules.
Query Processor
ANSWER:
Interprets queries, creates a plan to modify the database or retrieve data, and
returns query results to the application. Performs query optimization to ensure
the most efficient instructions are executed on the data.
Storage Manager
,ANSWER:
Translates the query processor instructions into low-level file-system commands
that modify or retrieve data. Database sizes range from megabytes to many
terabytes, so the storage manager uses indexes to quickly locate data.
Transaction Manager
ANSWER:
Ensures transactions are properly executed. The transaction manager prevents
conflicts between concurrent transactions. The transaction manager also
restores the database to a consistent state in the event of a transaction or
system failure.
Metadata
ANSWER:
Data about the database, such as column names and the number of rows in each
table.
Relational Database
ANSWER:
Stores data in tables, columns, and rows, similar to a spreadsheet.
Relational Database
ANSWER:
All Relational Database systems support the SQL query language.
Relational Database
ANSWER:
Relational systems are ideal for databases that require an accurate record of
every transaction, such as banking, airline reservation systems, and student
records.
MongoDB (NoSQL)
ANSWER:
The newer non-relational systems are called NoSQL, for 'not only SQL', and are
optimized for big data.
SQL Statements
,ANSWER:
INSERT inserts rows into a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
CREATE TABLE (Statement)
ANSWER:
A statement that creates a new table by specifying the table and column names.
Each column is assigned a data type that indicates the format of column values.
Data types can be numeric, textual, or complex.
Data Type
ANSWER:
INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Database Design
ANSWER:
Analysis
Logical design
Physical design
Analysis Phase, Conceptual Design, Entity-Relationship Modeling (Database
Design)
ANSWER:
This phase specifies database requirements without regard to a specific
database system. Requirements are represented as entities, relationships, and
attributes. An entity is a person, place, activity, or thing. A relationship is a link
between entities, and an attribute is a descriptive property of an entity.
Logical Design (Database Design)
ANSWER:
, This phase implements database requirements in a specific database system.
For relational database systems, Logical design converts entities, relationships,
and attributes into tables, keys, and columns.
Physical Design
ANSWER:
Specifies indexes, table structures, and partitions. This phase adds indexes and
specifies how tables are organized on storage media. Affects query processing
speed but never affects the query result.
Data Independence
ANSWER:
Allows database designers to tune query performance without changes to
application programs.
Application Programming Interface (API)
ANSWER:
To simplify the use of SQL with a general-purpose language, database programs
typically use an
Application Programming Interface(API)
MySQL Command-Line Client
ANSWER:
A text interface included in the MySQL Server download.
MySQL
ANSWER:
'World' database, a database that is usually installed with My SQL
Error Code
ANSWER:
MySQL Server returns an Error Code and description when an SQL statement is
syntactically incorrect or the database cannot execute the statement.
Database Model
ANSWER:
