DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-1 David M. Kroenke’s Chapter Five: Data Modeling with the ER Model Part Two Database Processing: Fundamentals, Design, and Implementation

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-2 Strong Entity Patterns: 1:1 Strong Entity Relationships

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-3 Strong Entity Patterns: 1:1 Strong Entity Relationships

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-4 Strong Entity Patterns: 1:N Strong Entity Relationships

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-5 Strong Entity Patterns: 1:N Strong Entity Relationships

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-6 Strong Entity Patterns: N:M Strong Entity Relationships

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-7 Strong Entity Patterns: N:M Strong Entity Relationships

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-8 Strong Entity Patterns: N:M Strong Entity Relationships

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-9 ID-Dependent Relationships: The Association Pattern Note the Price column, which has been added.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-10 ID-Dependent Relationships: The Association Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-11 ID-Dependent Relationships: The Multivaled Attribute Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-12 ID-Dependent Relationships: The Multivaled Attribute Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-13 ID-Dependent Relationships: The Multivaled Attribute Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-14 ID-Dependent Relationships: The Multivaled Attribute Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-15 ID-Dependent Relationships: The Archtype/Instance Pattern The archtype/instance pattern occurs when the ID-dependent child entity is the physical manisfestation (instance) of an abstract or logical parent: –PAINTING : PRINT –CLASS : SECTION –YACHT_DESIGN : YACHT –HOUSE_MODEL: HOUSE

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-16 ID-Dependent Relationships: The Archtype/Instance Pattern Note that these are true ID-dependent relationships - the identifier of the parent appears as part of the composite identifier of the ID- dependent child.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-17 ID-Dependent Relationships: The Archtype/Instance Pattern Note the use of weak, but not ID- dependent children.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-18 Mixed Patterns: The Line-Item Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-19 Mixed Patterns: The Line-Item Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-20 Mixed Patterns: Other Mixed Patterns Look for a mixed pattern where: –A strong entity has a multivalued composite group, and –One of the elements of the composite group is an identifier of another strong entity

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-21 Mixed Patterns: Other Mixed Patterns

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-22 Mixed Patterns: Other Mixed Patterns

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-23 Mixed Patterns: The For-Use-By Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-24 Mixed Patterns: The For-Use-By Pattern

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-25 Recursive Relationships A recursive relationship occurs when an entity has a relationship to itself

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-26 Recursive Patterns: 1:1 Recursive Relationship

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-27 Recursive Patterns: 1:N Recursive Relationship

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 5-28 Recursive Patterns: N:M Recursive Relationship