RelationalDBDesign
SiteMap
Database Analysis
Database Design
Extended DB Features
Oracle SQL Extensions
Attributes-Entities
«Prev
Next»
Database Design
Database Structure
Relational Database Model
Relationally Complete
Relational Completeness
Database Structure
Linking Database Tables
SQL in RDBMS
Create Table SQL
DBMS
Database Change Management
Relational DB Structure
Database Life Cycle
Database Design Strategy
Subject Approach DB Design
Design Subject
Application Approach Design
Schema Architecture
Three Schema Arch
DBLC Design Stages
Post Design Stages
Design Tools
DB Design Strategy Conclusion
Requirements Analysis
Requirements Analysis
Define Business Objects
BO Characteristics
Business Rules Importance
Interview Data Users
Data Flow Diagram
Creating User Views
Calculated Fields
Requirements Documentation
Requirements Analysis Conclusion
Attributes and Entities
Entities Conceptual Model
Store Entity Values
Rules for Creating Identifiers
Entity Instances
Attribute Domains Types
Multivalued Attribute
Multi-Valued Attributes
Multivalued Attribute(resolve)
Entity Attribute Constraints
Module Summary
ER Diagrams
ERD Concept
Three Relationship Types
One to One Relationships
Identify one To One
One to many Relationships
Identify One to Many
Define many To Many
Identify Many To Many
Many to Many Challenges
Convert m:n to 1:n
Mandatory Optional Relationship
Optional Participation Relationships
ERD Conclusion
ERD Conventions
ER Diagram
Three Model Types
idef1x Crowsfoot Chen Models
Entity Attribute Relationship
ER Diagram Types
Crow's Foot Notation
DB Participation Types
Interview End- Users
Verbalize ER Diagram
ER diagram model Types
Database Entities and Attributes - Quiz
Each question is worth one point. Select the best answer or answers for each question.
1.
Which of the following terms refer to constraints placed on attributes?
Please select all the correct answers.
A.
domains
B.
key attributes
C.
single-valued
2.
Which of the following terms are equivalent to an instance of an entity?
Please select all the correct answers.
A.
field
B.
record
C.
row
D.
table
3.
Which of the following statements correctly describes a multi-valued attribute?
Please select all the correct answers.
A.
It contains two or more data values.
B.
It can be resolved by creating a new entity.
C.
It can be resolved by creating a new key attribute.
D.
It diminishes data integrity.
4.
Which of the following is an appropriate choice as an entity identifier?
Please select the best answer.
A.
last name
B.
social security number
C.
telephone number
D.
full name
5.
Which of the following are examples of standard domain types?
Please select all the correct answers.
A.
date
B.
currency
C.
numeral
D.
color