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© Virtual University of Pakistan
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© Virtual University of Pakistan
In the name of Allah © Virtual University of Pakistan
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Database Management Systems
Lecture -1 © Virtual University of Pakistan
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© Virtual University of Pakistan
Course Objectives Introduction to Very basics Guides through Different design stages Familiarize with a tool Emphasis on Design stages of Databases © Virtual University of Pakistan
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Importance of Course © Virtual University of Pakistan
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Lecture Overview Database Definition Comparison with the prior Data Processing approach Pros & Cons of Databases © Virtual University of Pakistan
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What is a Database © Virtual University of Pakistan
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Database Def-1 A database is a shared collection of logically related data that is stored to meet the requirements of different users of an organization © Virtual University of Pakistan
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Database Def-2 A database is a self-describing collection of integrated records © Virtual University of Pakistan
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Database Def-3 A database models a particular real world system in the computer in the form of data © Virtual University of Pakistan
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The concept of a shared organizational database
Management Control Planning Marketing Product Development Sales Corporate Database Accounting Accounts Payable Receivable Manufacturing Production Scheduling © Virtual University of Pakistan
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A bit of History Computer initially used for computational/ engineering purposes Commercial applications introduced File Processing System © Virtual University of Pakistan
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File Processing System
A collection of programs that perform services for the end-users such as production of reports © Virtual University of Pakistan
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File Processing Systems
Library Applications Data Files Examination Applications Data Files Registration Applications Data Files © Virtual University of Pakistan Program and Data Interdependence
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File Processing Systems
Fine Books Issued Father Name Name Reg_Number Library Grade Semester Class Address Name Reg_Number Examination Class Address Phone Father Name Name Reg_Number Registration Duplication of Data Vulnerable to Inconsistency © Virtual University of Pakistan
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Advantages of Database Approach
Registration Examination Library Applications Database Management System University Students Database - Data Sharing - Data Independence - Controlled Redundancy - Better Data Integrity First Lecture Ends © Virtual University of Pakistan
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