INTRO TO RDBMS-OODBMS-ORDBMS Seema Sirpal Delhi University Computer Centre Databases Data - raw facts/details DATABASE- A shared collection of logically related data (and a description of this data)‚ designed to meet the organization needs of an organization The Database Management System (DBMS) - software that enables users to define‚ create and maintain the database and provides controlled access to the database Why We Need DBMS There is an information explosion in today’s
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NATIONAL OPEN UNIVERSITY OF NIGERIA COURSE CODE :MBA 758 COURSE TITLE: DATABASE MANAGEMENT SYSTEM COURSE GUIDE MBA 758 DATABASE MANAGEMENT SYSTEM Course Writer Gerald C. Okereke Eco Communications Inc. Lagos Ikeja Mr. E. Eseyin National Open University of Nigeria Dr. O. J. Onwe National Open University of Nigeria Bimbola‚ E.U. Adegbola National Open University of Nigeria Course Editor Programme Leader Course Coordinator NATIONAL OPEN UNIVERSITY OF NIGERIA National Open University
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Chapter GH TE D MA 1 Relational Database Concepts CO PY RI TE RI AL very organization has data that needs to be collected‚ managed‚ and analyzed. A relational database fulfills these needs. Along with the powerful features of a relational database come requirements for developing and maintaining the database. Data analysts‚ database designers‚ and database administrators (DBAs) need to be able to translate the data in a database into useful information for both day-to-day
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A data model is a collection of high-level data description constructs that hide many low-level storage details A semantic data model is a more abstract‚ high-level data model that makes it easier for a user to come up with a good initial description of the data in an enterprise. A database design in terms of a semantic model serves as a useful starting point and is subsequently translated into a database design in terms of the data model the DBMS actually supports. A widely used semantic
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1 RELATIONAL DATABASE MANAGEMENT SYSTEM UNIT-1 INTRODUCTION:DATA :- Data is a collection of facts‚ which is in unorganized but they can be organized into useful form. Data is of two types :1.Raw Data :- It is a Data which are collected from different sources and has no meaning. ` 2. Derived Data :- It is a data that are extracted from Raw Data and used for getting useful information. Derived Data is called as INPUTDATA. INPUT DATA is processed to get the OUTPUT data. The OUTPUT DATA is called as
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RDBMS Concepts 1. What is database? A database is a logically coherent collection of data with some inherent meaning‚ representing some aspect of real world and which is designed‚ built and populated with data for a specific purpose. 2. What is DBMS? It is a collection of programs that enables user to create and maintain a database. In other words it is general-purpose software that provides the users with the processes of defining‚ constructing and manipulating the database for various applications
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Leonard A Wey CS251 – 1102B – 05 Prof. Cathy Vandercreek Phase 4 Individual Project June 13‚2011. Table of Contents SECTION HEADING: Phase 1 – Gathering all necessary Information for Database Design 1. Scope of Project 2. Project Identification 3. Database Overview 4. Document
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Introduction Performance of a database can be greatly impacted by the manner in which data is loaded. This fact is true regardless of when the data is loaded; whether loaded before the application(s) begin accessing the data‚ or concurrently while the application(s) are accessing the data. This paper will present various strategies for locating data as it is loaded into the database and detail the performance implications of those strategies. Data Clustering‚ Working Sets‚ and Performance
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Information systems (IS) focuses on the system making use of technology and information technology (IT) focuses on technology and how it can help in disseminating information. Usually Information system are build using the information technology. Information system referring to system designed to create‚ store‚ manipulate‚ communicate and disseminate information. Information systems typically include an IT component but are not purely concerned with IT‚ focusing in instead‚ on the end use of
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Linux vs. Mac vs. Windows Linux vs. Mac vs. Windows The operating systems Linux®‚ Macintosh® (Mac) and Microsoft® Windows® are the main software to every computer system to run properly along with other hardware. These operating systems (OS ’s) are very different in several ways‚ but they also have some similarities too. Linux‚ Mac and Windows use memory management‚ process management‚ file management and security management to operate the computer systems correctly
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