CIS 505 Week 1|Complete Questions with 100% Correct Answers
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Course
CIS 505
Institution
CIS 505
CIS 505 Week 1|Complete Questions with 100% Correct Answers
OLTP
Online Transaction Processing
OLAP
online analytical processing
transactional database
A database designed to keep track of the day-to-day transactions of an organization.
Analytical Data Store
Stores historical transactional...
CIS 505 Week 1|Complete Questions with 100%
Correct Answers
OLTP
Online Transaction Processing
OLAP
online analytical processing
transactional database
A database designed to keep track of the day-to-day transactions of an organization.
Analytical Data Store
Stores historical transactional and summary data
relational database
Most common structure for database.
*Distinguished by multiple tables with interrelated fields.
*When queried, data can be pulled form any # of relations that may be contained in multiple databases.
*Provides lots of flexibility.
Analytical Data Store Purpose
Extract, Transform, Load
Analytical Database Use What Paradigm
Dimensional Paradigm
Database
organized collection of logically related data
Database Management System (DBMS)
The collection of programs that manages the database structure and controls access to the data stored
in the database.
Three-Level Architecture
standard database structure consisting of physical database, conceptual, external
Database Design Layers
Conceptual - study and model data in a tech independent manner (create ER diagram)
L
, Conceptional Data Model
Study and model the data in a tech independent manner
Logical Database Design
To translate the conceptual representation to the logical structure of the database, which includes
designing the relations (relational databases schema)
Physical Data Model
Map logical design to actual DBMS
ERD
Entity Relationship Diagram
entity
A unique identifiable thing (person, order)
Relationship
Describe how two entities relate to one another (makes)
attribute
A characteristic of an entity or relationship ( first name, order number)
Primary Key
A field (or group of fields) that uniquely identifies a given entity in a table
Attribute - Simple
Cannot be broken into smaller parts
Attribute - Composite
Broken into smaller parts (name, address)
Attribute - Single Value
Only one value, birthday, gender
attribute- multivalued
More than one possible value (phone number, cars, siblings)
type of relationship database
One to one 1:1, one to many 1:N, many to many M:N
Cardinality
expresses the specific number of instances in an entity
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