'Derived attributes' diaporamas de présentation

Data Modeling Using the Entity-Relationship (ER) Model

Data Modeling Using the Entity-Relationship (ER) Model. IS 320: Introduction to Database Hatoon AlSagri. Database Design. Real-world domain. Conceptual model. DBMS data model. Create Schema (DDL). Load data (DML). Steps in building a database for an application:

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Database Systems: Design, Implementation, and Management Tenth Edition

Database Systems: Design, Implementation, and Management Tenth Edition. Chapter 4 Entity Relationship (ER) Modeling. Connectivity and Cardinality. Connectivity Describes the relationship classification Cardinality

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Database Design 2: Creating an ER Model

Database Design 2: Creating an ER Model. CS 320. Review: Steps in Creating an Entity-Relationship Model. Identify entities Identify entity attributes and primary keys Specify relationships. ER Model Notation. Entity. Primary key: Field whose value is unique for each record

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Bringing It All Together in a Commercial RDBM Package

Packages such as Microsoft Access, FoxPro and Oracle support this functionality. Bringing It All Together in a Commercial RDBM Package. Good relational database software packages allows the user to:

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An Example: Video Rental System

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CIT731: Database Development

CIT731: Database Development. Multiplicity. Multiplicity. Multiplicity is a special type of association which shows the number of objects from one class that relate with a number of objects in an associated class. One class can relate to each in:- One-to-one One-to-many One-to-one or more

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Denormalization

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Denormalization

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Required MAC protocol features for non-medical BAN Date Submitted: 13-05-2008 Source: Ranjeet Kumar Patro, Kiran Bynam, Giriraj Goyal, Arun Naniyat Contact: Ranjeet Kumar Patro

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