1 Chapter 1 Database Systems Database Systems: Design‚ Implementation‚ and Management‚ Seventh Edition‚ Rob and Coronel 1 1 In this chapter‚ you will learn: • The difference between data and information • What a database is‚ what the different types of databases are‚ and why they are valuable assets for decision making • The importance of database design • How modern databases evolved from file systems Database Systems: Design‚ Implementation‚ & Management‚ 7th Edition‚ Rob
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Download at www.eBook12.Com Download at www.eBook12.Com This page intentionally left blank Download at www.eBook12.Com Introduction to Database Management Mark L. Gillenson‚ Paulraj Ponniah‚ Alex Kriegel‚ Boris M. Trukhnov‚ Allen G. Taylor‚ and Gavin Powell with Frank Miller Download at www.eBook12.Com Credits PUBLISHER Anne Smith ACQUISITIONS EDITOR Lois Ann Freier MARKETING MANAGER Jennifer Slomack SENIOR EDITORIAL ASSISTANT Tiara Kelly PRODUCTION MANAGER Kelly Tavares PRODUCTION
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HISTORY OF DATABASE MANAGEMENT SYSTEM With the progress in technology in the areas of processors‚ computer memory‚ computer storage and computer networks‚ the sizes‚ capabilities‚ and performance of databases and their respective DBMSs have grown in orders of magnitudes. The development of database technology can be divided into three eras based on data model or structure: navigational‚ SQL/relational‚ and post-relational. The two main early navigational data models were the hierarchical model
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Some people prefer to work for a large company. Others prefer to work for a small company. Which would you prefer? What large company can give you is rather different from what you can get from a small one. Each one has its benefits and perks‚ and what to choose depends on your long term goals‚ lifestyle‚ personality and so on because of the difference in corporate structure‚ staff turnover rate and goals between large and small companies. Concerning small ones‚ employees get much more freedom
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Essay # 3 There’s no place like Safeway that’s why Safeway is better than Save A Lots Safeway has a fantastic atmosphere were customers feel at ease‚ the friendly employees always had a smile they face on the other hand Save A Lot had a poor envirment were the shoppers were ignored workers didn’t have a pleasant attitude. I said to myself why have I shop at Save A Lot for so many years? Suddenly‚ I had an Oprah ‚Aha! Moment which came over me‚ after that day I have not been back to
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Designing Databases: Building a Conceptual Data Model [1] Fundamentals of Databases Alvaro A A Fernandes School of Computer Science University of Manchester Acknowledgements 2 These slides are minor adaptaAons of material authored and made available to instructors by Ramez Elmasri
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Large dog vs. small dog Most people like having dogs as his or her pets. Dogs can be a very faithful and playful animal. Most dogs can be trained easily while others cannot‚ because all dogs have different personalities. However‚ large dogs can sometimes be a hand full to some people‚ while small dogs are much easier to handle. I have two small dogs and one large dog. Between my three dogs‚ they all have different personalities. Firstly‚ my large dog is a hand full compared to my small dogs. He
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DATABASE: A database is an organized collection of data. The data is typically organized to model relevant aspects of reality (for example‚ the availability of rooms in hotels)‚ in a way that supports processes requiring this information (for example‚ finding a hotel with vacancies). A general-purpose database management system (DBMS) is a software system designed to allow the definition‚ creation‚ querying‚ update‚ and administration of databases. Well-known DBMSs include MySQL‚ PostgreSQL‚ SQLite
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DATABASE A database is a collection of data organized to meet users’ needs. Why This Matters Without data and the ability to process it‚ an organization would not be able to successfully engage in business activities‚ nor would it be able to generate reports to support knowledgeable workers and decision makers which in turn help’s to achieve organizational goals; it would not be able to pay employees‚ send out bills‚ and order new inventory. Databases have made it possible to map the structure
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TO BELONG IS NOT NECESSARILY TO IDENTIFY WITH IT In our social life‚ each person has one’s own roles and responsibilities‚ attitudes and values. Since every individual is unique and distinct compared to one another‚ these elements that construct our individuality are not always similar. Similarities and reflection of our values make us belong to a group‚ but the differences are barriers that stop ourselves from being recognized as an indivisible part of it. Belonging and identity are inseparable;
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