ER DIAGRAM

DATABASE DESIGN

ENTITY / RELATIONSHIP MODELLING

ENTITY / RELATIONSHIP DIAGRAMS

ENTITIES

DIAGRAMMING ENTITIES

ATTRIBUTES

DIAGRAMMING ATTRIBUTES

RELATIONSHIPS

CARDINALITY RATIOS

DIAGRAMMING RELATIONSHIPS

Removing M:M Relationships

MAKING ER MODELS

EXAMPLE

EXAMPLE - ENTITIES

EXAMPLE - RELATIONSHIPS

EXAMPLE : ER DIAGRAM

EXAMPLE : ER DIAGRAM

ENTITIES AND ATTRIBUTES

EXAMPLE : ENTITIES AND ATTRIBUTES

EXAMPLE : ER DIAGRAM ENTITIES AND ATTRIBUTES

EXAMPLES : RELATIONSHIP

EXAMPLE : ER DIAGRAM