'Physical data independence' diaporamas de présentation

Overview of system design

Overview of system design. Understanding the Elements of Design. Design is process of describing, organizing, and structuring system components at architectural design level and detailed design level Focused on preparing for construction Like developing blueprints Three questions

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Database Management System (DBMS)

Database Management System (DBMS). Collection of interrelated data Set of programs to access the data DBMS contains information about a particular enterprise DBMS provides an environment that is both convenient and efficient to use. Database Applications: Banking: all transactions

1.74k views • 52 slides

Answering Queries Using Views: A Survey

Answering Queries Using Views: A Survey. Alon Y. Levy Presented by: Catharina Vijay. Motivation. Rewriting queries using views is important because of its relevance in the following areas: Query optimization Maintenance of physical data independence Data integration

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WEL COME

WEL COME. PRAVEEN M JIGAJINNI PGT (Computer Science) MTech[IT],MPhil (Comp.Sci), MCA, MSc[IT], PGDCA, ADCA, Dc. Sc. & Engg. email: praveenkumarjigajinni@yahoo.co.in. Chapter 11 Database Concepts. Database Concepts. INTRODUCTION

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CS 4 40 : Database Management Systems

CS 4 40 : Database Management Systems. 1: Introduction. Welcome to CS440 !. 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

Database. More database concepts and vocabulary. Database Categorizations I. How many users can use the database at a given time? If one: It is a single-user database . If more than one: It is a multi-user database .

784 views • 46 slides

Entity Relationship Diagrams

Entity Relationship Diagrams. Goals of Database Design To full fill information requirements of the users and application. To support all processing requirements as well as all performance. criteria like response time, processing time and storage space.

578 views • 43 slides

Database Environment

Database Environment. Chapter 2 AIT632 Sungchul Hong. Last Class. Database related definitions Traditional file system Database approach Components of the DBMS environment Hardware, software, data, procedure, people Roles in the database environment

654 views • 42 slides

Database system concept and Architecture

Database system concept and Architecture. Data Models, Schemas, and Instance Categories of Data Models Schemas, Instance, and Database State Three-schema Architecture and Data Independence The three levels of the Architecture Data Independence Database languages and Interface DBMS Language

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DATA ENVIRONMENT

DATA ENVIRONMENT. DATABASE MANAGEMENT SYSTEM 1. Database Architecture. The Three-Level ANSI-SPARC ARCHITECTURE. DBTG (Database Task Group)

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Introduction

Introduction Points Use of Database Systems View of Data Database Languages RDBMS Database Design Object-based and semi - structured databases Data Storage and Querying Transaction Management Database Architecture Database Users and Administrators Overall Structure

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Databases and DBMSs

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Chapter 1: Introduction

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The Relational Model and Relational Algebra

The Relational Model and Relational Algebra. Nothing is so practical as a good theory Kurt Lewin, 1945. The relational model. Overcomes shortcomings of earlier database models Has a strong theoretical base Codd was the major developer. Problems with other models.

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CONCEPT OF DATABASE

CONCEPT OF DATABASE. Contents. Database Definition What Is a DBMS? DBMS Purpose of Database System Why Use a DBMS? Levels of Abstraction Example of database Data Independence Data Models Entity-Relationship Model. Database Definition.

299 views • 16 slides

Functions of Database Management Systems

Functions of Database Management Systems. Data storage retrieval and update facilities A user-accessible catalogue or data dictionary Support for shared update Backup and recovery services Security services Integrity services Connectivity Utilities. Support for Logical Transactions.

362 views • 13 slides

Database Administrator

Database Administrator. Contents. Definition Components Advantages Limitations. Contents Definition Functions. Definition DBA : A DBA is a person or group of persons responsible for overall control of database system. Functions of DBA Deciding information contents of database system

479 views • 12 slides

Database management systems

Database management systems. By Stephanie Wood And Nedziba Bubregovic. What exactly is a database management system?. A very large collection of data A database management system is a software package designed to store and manage data Models real-world Entities (Ex: Students, courses)

325 views • 11 slides

Database Environment

Database Environment. CPSC 356 Database Ellen Walker Hiram College. Three Levels of Abstraction. External level How users perceive the data Multiple views Conceptual level Description of data and relationships Internal (Physical) level How the data is physically stored.

108 views • 10 slides