Brief Introduction to Database Concepts Andrea Rodr´ ıguez Summer School - Castell´n 2004 o Department of Computer Science University of Concepci´n‚ Chile o http://www.inf.udec.cl/∼andrea andrea@udec.cl 1 Introduction Information and data are different. Information is understood by a person. Data are values stored on a passive medium like a computer disk. The purpose of a database management system (DBMS) is to bridge the gap between information and data - the data stored in memory or on disk
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tracking. However‚ it may not be useful with large sets of data and data that vary. A database maybe a more useful choice because it can store all types of data and the marketing assistant can generate reports for future reference while making changes (changing the shipment time to make sure it arrives on time) In cases like this where only one person is responsible for a large database it is a good idea to use a database management systems that are available across all department of an organization. This
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Oracle9i Backup and Recovery Concepts Release 2 (9.2) March 2002 Part No. A96519-01 Oracle9i Backup and Recovery Concepts‚ Release 2 (9.2) Part No. A96519-01 Copyright © 2001‚ 2002 Oracle Corporation. All rights reserved. Primary Author: Lance Ashdown Graphic Designer: Valarie Moore Contributors: Beldalker Anand‚ Tammy Bednar‚ Don Beusee‚ Wei Hu‚ Donna Keesling‚ Bill Lee‚ Lenore Luscher‚ Ron Obermarck‚ Muthu Olagappan‚ Francisco Sanchez‚ Vinay Srihari‚ Steve Wertheimer The Programs
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After all business requirements have been gathered for a proposed network‚ they must be modeled. Models are created to visually represent the proposed network so that business requirements can easily be associated with network objects to ensure that all requirements have been completely and accurately gathered. Basically data modeling can fall into two types of categories: Physical modeling and Logical modeling. Logical modeling deals with gathering business requirements and converting those
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Concurrency Control in Database Systems Key Points The purpose of concurrency control is to ensure that one user’s work does not inappropriately influence another user’s work. In some cases‚ these measures ensure that a user gets the same result when processing with other users as that person would have received if processing alone. In other cases‚ it means that the user’s work is influenced by other users but in an anticipated way. When many transactions take place at the same time‚ they are
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Title: Of Mice and Men Author: John Steinbeck Protagonist: George and Lennie Antagonist: Curly‚ Society Themes: The Predatory Nature of Human Existence‚ Fraternity and the Idealized Male Friendship‚ The Impossibility of the American Dream‚ Friendships‚ Isolation‚ Confinement Quotes: “We know what we got‚ and we don’t care whether you know it or not.”‚ “I got you to look after me‚ and you got me to look after you‚ and that’s why.”‚ “Maybe ever’body in the whole damn world is scared of each other
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Sports Day System Name: Chan Ying Wah Content: |Objective……………………........... |Pg.3-5 | |Analysis.……..…….……………….. |Pg.6-11 | |Design ……....…….……………….. |Pg.13-21 | |Implementation……………………..
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DB2 10 Exam 610 Practice Questions by Robert Wingate For certification test: DB2 9 DBA for z/OS (000-732) DB2 9 for z/OS Database Administration: Certification Study Guide by Susan Lawson and Daniel Luksetich DB2 10 DBA for z/OS (000-612) DB2 10 for z/OS Database Administration: Certification Study Guide by Susan Lawson and Daniel Luksetich For certification test: DB2 9 System Administrator for z/OS (000-737)
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significance: - Mangrove forests are among the most productive terrestrial eco systems and are natural and are a renewable resource. Mangroves are not a marvel just for their adaptations but also for the significant role they play in our environment. * Mangrove ecosystem act as Buffer Zone between the land and sea. * Mangroves protect the coast against erosion due to wind‚ waves‚ water currents and protect coral reefs‚ sea-grass bed and shipping lanes against siltation. They are also
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Session 28 Safety Pharmacology Studies for Human Pharmaceuticals This guidance was developed to help protect clinical trial participants and patients receiving marketed products from potential adverse effects of pharmaceuticals‚ while avoiding unnecessary use of animals and other resources. This guidance provides a definition‚ general principles‚ and recommendations for safety pharmacology studies. Pharmacology studies have been performed worldwide for many years as part of the nonclinical
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