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 Concepts DataBase – a collection of information related to specific entity (e.g. organization‚ bank‚ college‚ library etc.) DBMS – (Database management system) – a application through which we can control the database i.e. we can store data into database‚ update the data and delete also we can retrieve the data from database. For doing these operation DBMS support a language called Structured Query language (SQL). SQL accomplishes many powerful tasks with a mere seven statements: SELECT
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protect the privacy. And for China the situation is different. Majority of people do not receive too well education‚ and quality of majority is not trustful‚ so we must make complete law‚ but not the model of self-regulation of people themselves. And we know there is no enough law about the protection of privacy especially for the Internet privacy of Chinese citizens. And in my opinion‚ Chinese government is in urgently needed to build law of privacy especial for the Internet privacy‚ and it should
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PRIVACY Yet people often dole out all kinds of personal information on the Internet that allows such identifying data to be deduced. Services like Facebook‚Twitter and Flickr are oceans of personal minutiae — birthday greetings sent and received‚ school and work gossip‚ photos of family vacations‚ and movies watched. Computer scientists and policy experts say that such seemingly innocuous bits of self-revelation can increasingly be collected and reassembled by computers to help create a picture
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A Database Project for Trinity University Canteen Submitted in Partial Fulfilment of the requirements for the Course INTE_204 (Systems Analysis & Design) By: Wilbourne N. Lomboy Roven Gareth G. Juarez Oct. 10‚ 2013 Chapter 1 Background of the Project Introduction Concessionaires converge at the two-storey University Canteen to give students a wide array of choices for snacks and meals. Presented fast-food style‚ students serve themselves
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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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Privacy – Such a Lonely Word Examining the Implications of User Privacy to Corporate Management Privacy – Such a Lonely Word Examining the Implications of User Privacy to Corporate Management The concept of privacy has moved more and more toward the forefront of people’s minds since the attacks of September 11th‚ on the World Trade Center in New York. Privacy is not necessarily about ‘hiding something’ but it is more of a ‘liberty’ that many would argue is under attack by the government (Schneier
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have? Ans: An "owner" account is given to those in control of specific relations. They have select‚ modification‚ and reference privileges on that given relation. 2) How is the view mechanism used as an authorization mechanism? Ans: A multiuser database system must selectively permit users to share data‚ while retaining the ability to restrict data access. There must be a mechanism to provide protection and security‚ permitting information to be accessed only by properly authorized users. Further
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Concurrency Control in Distributed Database Systems PHILIP A. BERNSTEIN AND NATHAN GOODMAN Computer Corporation of America‚ Cambridge‚ Massachusetts 02139 In this paper we survey‚ consolidate‚ and present the state of the art in distributed database concurrency control. The heart of our analysts is a decomposition of the concurrency control problem into two major subproblems: read-write and write-write synchronization. We describe a series of synchromzation techniques for solving each subproblem
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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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