Varlik-Iliski Modeli Entity-Relationship ER Model

Nov 10, 2012

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Varlik-Iliski Modeli (Entity-Relationship (ER) Model). Varlik (Entity) : Diger nesnelerden ayirt edilebilen tekil (unique) mini-d

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Varlik-Iliski Modeli Entity-Relationship ER Model

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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.

1.33k views • 53 slides

Entity-Relationship Model

Entity-Relationship Model. © Pearson Education Limited 1995, 2005. ER diagram of Branch user views of DreamHome. © Pearson Education Limited 1995, 2005. Concepts of the ER Model. Entity types Relationship types Attributes. © Pearson Education Limited 1995, 2005. 1. Entity Type.

1.07k views • 50 slides

The Entity-Relationship (ER) Model

The Entity-Relationship (ER) Model. Chpt 2. Instructor: Xintao Wu. 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)

371 views • 23 slides

Entity-Relationship Model

Entity-Relationship Model. Lecture 5. Database Modeling and Implementation Process. Ideas . ER Design . Relational Schema. Relational DBMS Implementation. Database Modeling – ER Approach. A database can be modeled as a collection of entities, relationship among entities.

779 views • 68 slides

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.

675 views • 53 slides

The Entity-Relationship (ER) Model

The Entity-Relationship (ER) Model. Chapter 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)

352 views • 22 slides

Entity-Relationship Model

Entity-Relationship Model. Entity-Relationship Mode. What is it? Technique for developing an informal organization of tables How does it work? Identify entities (which become tables) Identify attributes of each entity (which become fields) Identify relationships. Notation. Entity

359 views • 14 slides

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.

786 views • 11 slides

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)

352 views • 23 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?

322 views • 18 slides

Entity-Relationship (ER)

Entity-Relationship (ER). One-to-one One-to-many Many-to-many. Refining The Entity-Relationship Diagram. Entities cannot be modeled unrelated to any other entity. Otherwise, when the model was transformed to the relational model, there would be no way to navigate to that table.

425 views • 22 slides

Entity-Relationship Model

Entity-Relationship Model. Gang Qian Department of Computer Science University of Central Oklahoma. Overview (Chapters 7 and 9). Overview of Database Design Process ER Model Concepts Entities and Attributes Entity Types, Value Sets, and Key Attributes Relationships and Relationship Types

811 views • 56 slides

the Entity-Relationship (ER) Model

the Entity-Relationship (ER) Model. Chapter 7 (6/E) Chapter 3 (5/E). Lecture Outline. Using High-Level, Conceptual Data Models for Database Design Entity-Relationship (ER) model Popular high-level conceptual data model ER diagrams Diagrammatic notation associated with the ER model.

529 views • 25 slides

Entity Relationship (ER) Modeling

Entity Relationship (ER) Modeling. The Entity Relationship Model (ERM). ER model forms the basis of an ER diagram ERD represents conceptual database as viewed by end user ERDs depict database’s main components: Entities Attributes Relationships. Entities.

706 views • 41 slides

Entity-Relationship Model

Entity-Relationship Model. Diagrams Class hierarchies Weak entity sets. Purpose of E/R Model. The E/R model allows us to sketch the design of a database informally. Designs are pictures called entity-relationship diagrams .

717 views • 52 slides

Entity Relationship (ER) Modeling

Entity Relationship (ER) Modeling. In this chapter, you will learn:. The main characteristics of entity relationship components How relationships between entities are defined and refined and how those relationships are incorporated into the database design process

960 views • 67 slides

The Entity-Relationship (ER) Model

The Entity-Relationship (ER) Model. Lecture 2 INFS614, Fall 2008. Purposes of DBMS. Provide support for “easy-to-use” data Data model (data) Transaction model (operation) Provide efficient storage and access of the data in terms of the data model and transactional model. Data Models.

741 views • 58 slides

Entity-Relationship Model

Entity-Relationship Model. Diagrams Class hierarchies Weak entity sets. 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. Designs are pictures called entity-relationship diagrams .

765 views • 54 slides

The Entity-Relationship (ER) Model

229 views • 22 slides

ER – Entity Relationship Diagram

ER – Entity Relationship Diagram. ER. 1976 proposed by Peter Chen ER diagram is widely used in database design Represent conceptual level of a database system Describe things and their relationships in high level. Basic Concepts.

1.01k views • 34 slides

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