RelationalDBDesign
SiteMap
Database Analysis
Database Design
Extended DB Features
Oracle SQL Extensions
Database Design
«Prev
Next»
Database Design
Database Structure
Relational Database Model
DB Model Types
Relationally Complete
Database Structure
Linking Database Tables
SQL in RDBMS
DBMS
RDBMS Functions
Database Change Management
Database Life Cycle
DBLC Design Stages
3 Schema Architecture
Post Design Stages
DBLC Stages
Design Tools
Application Approach DB Design
Database Design Strategy
Requirements Analysis
Business Rules Importance
Requirements Analysis
Customer Order Shipment
Define Business Objects
Data Flow Diagram
Create Flow Diagram
Interview Data Users
Attributes and Entities
Entities Conceptual Model
Multivalued Attribute(resolve)
Store Entity Values
Attribute Domains Types
Multivalued Attribute
Rules for Creating Identifiers
ER Diagrams
Three Relationship Types
Convert m:n to 1:n
One to One Relationships
Optional Participation Relationships
Mandatory Optional Relationship
Student Class Entities
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
Data Flow Diagram - Exercise
Objective:
Interpret data flow in the diagram.
Exercise scoring
This exercise is worth a total of 20 points. You will receive up to 10 points for each correctly answered question below.
Background/overview
In the preceding lesson, you learned that a data flow diagram illustrates how data is handled in an organization. In this exercise, you will apply what you learned to interpret a portion of a sample data flow diagram.
Instructions
Examine the following graphic that shows a small section of a data flow diagram.
Sample Data Flow diagram
Answer the following two questions:
What do the parallel lines located between the Vendor and Clerk squares represent?
How would you interpret ( in a single sentence and in the proper order), how data is being handled in the diagram?
Submitting your Exercise
Type or paste your answers into the text box below. Then click
Submit
to submit your answers and view a results page.
Submit