'Entity sets' diaporamas de présentation

Enhanced ER-diagram

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

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Chapter 3 Data Modeling Using the Entity-Relationship (ER) Model

Chapter 3 Data Modeling Using the Entity-Relationship (ER) Model. Dr. Bernard Chen Ph.D. University of Central Arkansas. Outline. Overview of the database design An Example Database Application Entity Types, Entity Sets, Attributes, and keys Relationship. Database Design.

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Chapter 7: Entity-Relationship Model

Chapter 7: Entity-Relationship Model. Chapter 7: Entity-Relationship Model. Design Process Modeling Constraints E-R Diagram Design Issues Weak Entity Sets Extended E-R Features Design of the Bank Database Reduction to Relation Schemas Database Design UML. Modeling.

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Entity-Relationship Model

Entity-Relationship Model. Lecture 5. Database Modeling and Implementation Process. Ideas. ER Design. Relational Schema. Relational DBMS Implementation. ER Model Components. Entity Sets Attributes Relationships. ER Model.

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Database Course

Database Course. General Information. TAs : Gideon Rothschild, office hours: Sun 16:00-17:00 at Ross 109 Aron Matskin, office hours: TBA Course Homepage: http://www.cs.huji.ac.il/~db Course Email: db@cs.huji.ac.il Moderated Newsgroup: local.course.db.ta

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DATABASE MANAGEMENT SYSTEMS TERM 2010-11 B. Tech IV/EEE II Semester UNIT-II PPT SLIDES

DATABASE MANAGEMENT SYSTEMS TERM 2010-11 B. Tech IV/EEE II Semester UNIT-II PPT SLIDES Text Books: (1) DBMS by Raghu Ramakrishnan (2) DBMS by Sudarshan and Korth. INDEX UNIT-2 PPT SLIDES S.NO Module as per Lecture PPT

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DATABASE MANAGEMENT SYSTEMS

DATABASE MANAGEMENT SYSTEMS. INDEX UNIT-2 PPT SLIDES S.NO Module as per Lecture PPT Session planner No Slide NO ------------------------------------------------------------------------------------------

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The Entity-Relationship (E-R) Model

The Entity-Relationship (E-R) Model. Lecture Topics Basic E-R modelling Extensions to E-R modelling Designing an E-R schema Deriving relational schema from E-R diagrams Textbook Chapter 2 Section 3.5. Overview of E-R model. used for database (conceptual schema) design

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History of Database Systems

History of Database Systems. 1950s and early 1960s: Data processing using magnetic tapes for storage Tapes provide only sequential access Punched cards for input Late 1960s and 1970s: Hard disks allow direct access to data Network and hierarchical data models in widespread use

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The Entity-Relationship Model

The Entity-Relationship Model. IS698 Min Song. 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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Database Systems

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CS 5 40 : Database Management Systems

CS 5 40 : Database Management Systems. 1: Introduction. Welcome to CS540 !. Arash Termehchy Assistant professor in the school of EECS Just moved here from Illinois Usable data exploration systems . Your turn: Name, field, DB background. Data management.

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Database Systems ( ????? )

Database Systems ( ????? ). 9/27 10/1, 2007 Lecture #2. Course Administration. Office Hour: Thur 2-3 Can everyone get the textbook? HW #1 will be on the course homepage later today It is due 2 weeks from today. Next week reading: R&G Chapters 3 & 4.1~4.2.

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Wat gaan wij leren?

Wat gaan wij leren?. Data Bases Data modelleren Hoe kan ik zien wat voor informatiesysteem er nodig is? Hoe maak ik een formeel model van een complex systeem op basis van de tekstuele beschrijving van het systeem? Hoe vertaal ik het model naar de tabelstructuur van de database? Queries

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Chapter 6: Entity-Relationship Model (part I)

Chapter 6: Entity-Relationship Model (part I). Modeling. A database can be modeled as: a collection of entities, relationship among entities. An entity is an object that exists and is distinguishable from other objects. Example: specific person, company, event, plant

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System Concepts and Architecture

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Entity-Relationship Modelling

Entity-Relationship Modelling. Entity Sets Relationship Sets Design Issues Mapping Constraints Keys E-R Diagram A data model is a collection of tools for describing data, data relationships, data semantics, and consistency constraints.

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Fig 3.12 Relation Movie with new attributes representing the owning information

Fig 3.12 Relation Movie with new attributes representing the owning information Fig 3.13 The relation Movie with star information. 3.3 From E/R Diagram to Relational Design

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Entity Relationship Model

Entity Relationship Model. Introduction:- The E-R model was introduced by P.P. Chen not only E-R model but also corresponding diagramming techniques. In a database management system (DBMS), a group of similar information or data, which is of interest to an organization is called an entity.

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