'Supertype subtype' presentation slideshows

Chapter 3

Chapter 3. Enhanced E-R Model and Business Rules. Objectives. Definition of terms Use of supertype/subtype relationships Use of generalization and specialization techniques Specification of completeness and disjointness constraints

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Chapter 4 The Enhanced E-R Model and Business Rules

Chapter 4 The Enhanced E-R Model and Business Rules. Supertypes and Subtypes. Subtype: A subgrouping of the entities in an entity type which has attributes that are distinct from those in other subgroupings.

854 views • 35 slides

DATABASE DESIGN AND DEVELOPMENT: A VISUAL APPROACH

314 views • 30 slides

Overview of Entity?Relationship Model

Entity?Relationship Model is a detailed, logical representation of the data for an organization or for a business area. What are the entities and relationships in the enterprise?

287 views • 28 slides

Chapter 2

238 views • 9 slides