'Relationship set' presentation slideshows

Part Two Database Design

1.82k views • 159 slides

E-R Model

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Conceptual Design Using the Entity-Relationship (ER) Model

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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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Entity-Relationship Diagrams and the Relational Model

Entity-Relationship Diagrams and the Relational Model. CS 186, Fall 2007, Lecture 2 R & G, Chaps. 2&3. A relationship, I think, is like a shark, you know? It has to constantly move forward or it dies. And I think what we got on our hands is a dead shark. Woody Allen (from Annie Hall, 1979).

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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

2.91k views • 47 slides

The Entity-Relationship Model (Chapter 2)

The Entity-Relationship Model (Chapter 2). 1. Main Phases of Database Design. 2. 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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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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CAS CS 460/660 Entity/Relationship Model

CAS CS 460/660 Entity/Relationship Model. Review. What a DBMS offer? Efficient data organization Efficient data retrieval Data integrity. Review-the big picture. Data Modelling Relational E-R Query Languages SQL Relational Algebra Relational Calculus Storing Data File Indexes

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The Entity-Relationship Model

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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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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?

450 views • 33 slides

The Entity-Relationship Model

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The Entity-Relationship (ER) Model

The Entity-Relationship (ER) Model. Chpt 2. Overview of db design. Requirement analysis Data to be stored Applications to be built Operations (most frequent) subject to performance requirement Conceptual db design Description of the data (including constraints)

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The Entity-Relationship Model

The Entity-Relationship Model. Chapter 2. Objectives. Overview of database design Requirement analysis, conceptual design , logical design, normalization, and physical design The entity-relationship (ER) model Basic constructs: Entities Relationships

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Chapter 3

Chapter 3. Data Modeling Using the Entity-Relationship Model. FIGURE 3.1 A simplified diagram to illustrate the main phases of database design. FIGURE 3.2 An ER schema diagram for the COMPANY database. FIGURE 3.3 Two entities, employee e 1 and company c 1 , and their attributes.

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The Entity-Relationship Model

The Entity-Relationship Model. Chapter 2. name. ssn. lot. Employees. ER Model Basics. Entity : Real-world object distinguishable from other objects. An entity is described (in DB) using a set of attributes . Entity Set : A collection of similar entities. E.g., all employees.

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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?

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?

310 views • 18 slides