1. Chapter 3 The Relational Model
Concepts
Properties
Keys
Relational Integrity
Base Relation & View

2. Concepts Relation Attribute Domain Tuple Degree Cardinality
Relational Database
Relational Schema

3. Properties Unique relation name Unique attribute No duplication tuples
No repeating group
Same domain for an attribute
Insignificance of the tuples or attributes order

4. Keys Superkey Candidate key Composite key Primary key Secondary key
Foreign key

5. Relational Integrity Null Types of integrity Types of constraint
Entity
Reference
Types of constraint
Domain (edit or field)
Enterprise (business rule)

6. Base Relation & View Base relation View Purpose of views
A named relation of an entity in conceptual schema
Tuples stored in physical database
View
Virtual relation
Dynamic generated for end user
Not stored in physical database
Purpose of views
Security
User friendly report
Performance

7. Assignment Review chapters 1-3 Read Chapter 4 Do Exercise 3.8
Due date: