'Binary relationships' presentation slideshows

Chapter 2: Entity-Relationship Model

Chapter 2: Entity-Relationship Model. Entity Sets Relationship Sets Design Issues Mapping Constraints Keys E-R Diagram Extended E-R Features Design of an E-R Database Schema Reduction of an E-R Schema to Tables. Entity Sets. A database can be modeled as: a collection of entities,

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DAMA, 2001 December.

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Entity-Relationship Model

Entity-Relationship Model. E/R Diagrams Weak Entity Sets Converting E/R Diagrams to Relations. Acknowledgments: Part of these lectures are based on material prepared by Jeffrey Ullman (co-author of course book). Purpose of E/R Model.

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Entity-Relationship Model*

E/R Diagrams Weak Entity Sets Converting E/R Diagrams to Relations. Entity-Relationship Model*. *Adapted from slides developed by Hector Garcia Molina. Purpose of E/R Model. The E/R model allows us to sketch database schema designs. Includes some constraints, but not operations.

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Entity-Relationship Model

Entity-Relationship Model. Slides by Jeffrey Ullman Modified by J. Welch to replace beers with candies. Purpose of E/R Model. The E/R model allows us to sketch database designs. Kinds of data and how they connect. Not how data changes.

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Chapter 11

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Introducing Asset Oriented Modeling and KLEEN

bdaum industrial communications What is AOM? Advantages of AOM The KLEEN modeler Current status and outlook. Introducing Asset Oriented Modeling and KLEEN. Asset Oriented Modeling. Rationale Concepts that differentiate AOM from ERM Higher order relationships

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Introduction to Database Design

Introduction to Database Design. Entity Relationship Model. Design of a Database. Design phases: Requirement Analysis Talk to people and figure out what they want Conceptual Database Design Do the design Many tools/modeling techniques ER , UML , Rambaugh, Booch, Yordon

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Chapter 3

Chapter 3. The Entity-Relationship Model. ER Model. Conceptual Design answers: What are the entities and relationships? What information about these entities and relationships should we store in the database? What are the integrity constraints or business rules? ER Model Concepts:

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Holistic Twig Joins Optimal XML Pattern Matching

Holistic Twig Joins Optimal XML Pattern Matching. Nicolas Bruno Columbia University. Nick Koudas Divesh Srivastava AT&T Labs-Research. SIGMOD 2002. XML Query Processing. XML query languages are complex, with many features.

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DATA MODELING SECTION 3

DATA MODELING SECTION 3. Data Modeling constructs. Structured Methodologies. The techniques are instructions that are carefully drawn up, often step-by-step, with each step building on the previous step. . Progresses from the highest level of abstraction to the lowest level of detail

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Chapter 7

Chapter 7. Normalization. Outline. Modification anomalies Functional dependencies Major normal forms Relationship independence Practical concerns. Modification Anomalies. Unexpected side effect Insert, modify, and delete more data than desired Caused by excessive redundancies

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Chapter 7

Chapter 7. Normalization. Outline. Modification anomalies Functional dependencies Major normal forms Relationship independence Practical concerns. Modification Anomalies. Unexpected side effect Insert, modify, and delete more data than desired Caused by excessive redundancies

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The Entity-Relationship Model

The Entity-Relationship Model. Chapter 2. Overview of Database Design. Conceptual design : ( ER Model is used at this stage.) What are the entities and relationships in the enterprise? What information about these entities and relationships should we store in the database?

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Conceptual Modeling

Conceptual Modeling. Entity-Relationship Diagrams. E-R Model Constructs. Entities Relationships Attributes. E-R Model Notation. Entity. Attribute. One-to-many relationship. Many-to-many relationship. Example of Relationship Type. COMPLETES. EMPLOYEE. COURSE.

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E-R Diagrams

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