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ERD/System Design, image - Coggle Diagram
ERD/System
Design
Describe The Process in a system
Present the system in a Diagrammatic form
Describe the system data in terms of objects, with relationships linking them.
Translate such conceptual descriptions into tables
Database Modeling
Process Modeling
Process components
inputs and outputs of each process
Data sources and destinations
Mode of data flow between processes
Data Modeling
Model only the data (no process)
Different components of the data
Relationship between Primary data components
Conceptual Design (ER)
What are enterprise entities and relationships ?
What information should we store in our db ?
What are integrity constraints that hold ?
What are the business rules ?
Database Schema (ERDiagrams)
Relational Schema
XML Schema
O O Schema
Hierarchical Schema
Description of entities within a db
Entity Relationship Model
Information system
Logical Model
Physical Model
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