'Ary relationship' diaporamas de présentation

Enhanced ER-diagram

CS157A Lecture 5. Enhanced ER-diagram. Prof. Sin-Min Lee Department of Computer Science.

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Database Systems

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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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Chapter 3 Data Modeling Using the Entity-Relationship Model

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Usage-based models of science: applications to community mapping and scholarly assessment Johan Bollen Digital Library R

Usage-based models of science: applications to community mapping and scholarly assessment Johan Bollen Digital Library Research & Prototyping Team Los Alamos National Laboratory - Research Library jbollen@lanl.gov Acknowledgements:

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Unit Reading Assignment

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Pertemuan <<20>> << Entity Relationship Diagram >>

Pertemuan <<20>> << Entity Relationship Diagram >>. Matakuliah : <<M0094>>/<<Pengantar Sistem Basis Data>> Tahun : <<2005>> Versi : <<1/1>>. Learning Outcomes. Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu :

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CSC271 Database Systems

CSC271 Database Systems. Lecture # 23. Summary: Previous Lecture. Database design using ER modeling Concepts of ER model Entities Relationships Attributes. Classification of Entity Types. The entity types can classified into Strong entity type Weak entity type. Strong Entity Type.

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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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University of Costa Rica Department of Computer and Information Sciences

University of Costa Rica Department of Computer and Information Sciences. Some Research Proposals and Challenges for Spatial Data Warehouses. Dra. Elzbieta Malinowski. Presentation plan. Introduction Conceptual multidimensional model Spatial extensions Modeling issues

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The Entity-Relationship Model

The Entity-Relationship Model. Chapter 2. Database Design Process. Requirement collection and analysis DB requirements and functional requirements Conceptual DB design using a high-level model Easier to understand and communicate with others Logical DB design (data model mapping)

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Modeling Your Data

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Ontology Generation Based on a User-Specified Ontology Seed

Ontology Generation Based on a User-Specified Ontology Seed. Cui Tao Data Extraction Research Group Department of Computer Science Brigham Young University. Supported by NSF. Introduction. Motivation: Traditional search engines: return documents

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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?

544 views • 18 slides

Chapter 9

Relational Database Design by ER- and EER-to-Relational Mapping . Chapter 9. Lecture # 20 August 4 ,2012. Review of ER-to-Relational Mapping Algorithm. We present the concepts of a general mapping algorithm Algorithm has 7 steps: Step 1: Mapping of regular (strong) entity types

561 views • 18 slides

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?

241 views • 18 slides

The Entity-Relationship (ER) Model

The Entity-Relationship (ER) Model. CS541 Computer Science Department Rutgers University. Overview of Database Design. Conceptual design : ( ER Model is used at this stage.) What are the entities and relationships in the enterprise?

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E/R to relational mapping

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