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Database Design
Database Structure
Relational Database Model
Relationally Complete
Relational Completeness
Database Structure
Linking Database Tables
SQL in RDBMS
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
Answer all five questions. Each is worth one point. For checkbox questions, select the exact set of correct answers: partial selections or extra choices earn no credit.
1.
Which rules describe attributes in the scalar relational design used in this module?
Please select all the correct answers.
A.
Each attribute has a domain defining its permitted values.
B.
Sorting rows changes the domain of an attribute.
C.
Each row holds one value for an attribute rather than a packed list of independent values.
2.
When an entity type is represented by a relational table, which terms describe one stored instance?
Please select all the correct answers.
A.
column
B.
record
C.
row
D.
table
3.
Which statements about a multivalued fact, such as a student belonging to several honor societies, are correct?
Please select all the correct answers.
A.
It can have several values for one entity instance.
B.
It can be represented by related rows, using a membership entity for the many-to-many association.
C.
Adding a new identifier alone removes the need to model the repeated values.
D.
Packing the values into one text field complicates validation of individual memberships.
4.
For a student system serving people from multiple countries, which proposed primary key best meets the stated need for a unique, stable, non-null identifier?
Please select the best answer.
A.
Last name
B.
A system-generated StudentID enforced as a primary key and retained for the life of the student record
C.
Telephone number
D.
Full name
5.
Which of these are built-in Oracle 26ai SQL data type names, rather than an application-defined business domain name?
Please select all the correct answers.
A.
DATE
B.
NUMBER
C.
BOOLEAN
D.
COLOR
Submit