Managing indexes

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  • Classification of Indexes An index is a tree structure that allows direct access to a row in a table. Indexes can be classified based on their logical design or on their physical implementation. The logical classification groups indexes from an application perspective, while the physical classification is derived from the way the indexes are stored. Single column and concatenated indexes A single column index has only one column in the index key—for example, an index on the employees number column of an employees table.

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  • In Oracle8 we saw the addition of bitmap indexes, function-based indexes, as well as reverse key indexes and star index structures. We also saw the Oracle SQL optimizer becoming more intelligent about the way indexes are used by SQL statements. In Oracle9i, we have the index skip scan, the and_equal hint to combine individual indexes into a contaminated index, as well as specialized bitmap access methods to improve the speed of data warehouse queries.

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  • COMPETITIVE SUPPLY CHAIN AND REVENUE MANAGEMENT: FOUR ESSAYS When the peer group measure is interacted with the choice index—in Column B, and again with additional controls in the remaining columns—the coefficient is indistinguishable from zero, with a negative point estimate in every specification. Panel B repeats this analysis, this time with the score earned by students when they were in the 12th grade.51 Again, estimates of the choice effect are imprecise but are—with one statistically insignificant exception—of the opposite sign from that predicted by the economic model....

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  • This dissertation addresses how the weather derivative hedges the corporate risk, how to price the indexed derivative as an exotic derivative instrument, and the implications of basis risk. These topics are summarized in an expanded uncertainty model. Under this framework, different hedging instruments for studying the optimal hedging portfolios are compared.

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  • Authors Samuel Erskine (MCT) Anders Asp (MVP) Andreas Baumgarten (MVP) Steve Beaumont Dieter Gasser Reviewers Stefan Allansson Steve Buchanan Wayne Robinson Acquisition Editor Andrew Duckworth Lead Technical Editor Dayan Hyames Technical Editors Joyslita D'Souza Pooja Pande Proofreaders Elinor Perry-Smith Lesley Harrison Indexer Tejal R. Soni Graphics Valentina D'silva Aditi Gajjar Production Coordinators Prachali Bhiwandkar Manu Joseph Cover Work Prachali Bhiwandkar Project Coordinator Abhishek Kori...

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  • Modern medicine is characterized by the continuously growing spectrum of improving diagnostic methods and therapeutic processes. It keeps getting more complicated and confusing and therefore also needs more order. The main goal of medical documentation is to provide information for the adequate care of patients. Carefully carried out written records like a patient history, physician indexes, or, more recently, patient databases serve to reach this goal.

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  • Course objectives theory and practice; should be applicable to all situation from small entrepreneur to large companies, apply following process: prepare – get information – analyse – decide – implement – control - adapt 2. History and background why should a company sell outside its territory? 3. Company stages domestic – export – international – global 1 1 2 3 II- Select a country and a region 1. Trade Agreements Depth of the agreements - key existing agreements and discussion 2.

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  • Spatial database management deals with the storage, indexing, and querying of data with spatial features, such as location and geometric extent. The field emerged from Geographic Information Systems (GIS) and Computer Aided Design (CAD) applications, from which it became apparent that there is a need for the efficient management of large-scale spatial data. More recently, Location Based Services (LBS) brought spatial data management needs to common users, who routinely run spatial queries on their computers or mobile devices.

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  • Managing Tables Storing User Data There are several methods of storing user data in an Oracle database: Regular tables Partitioned tables Index-organized tables Clustered tables Note: Partitioned tables, index-organized tables, and clustered tables are covered in other courses. Regular Table A regular table (generally referred to as a “table”) is the most commonly used form of storing user data. This is the default table and is the main focus of this lesson. A database administrator has very limited control over the distribution of rows in a table.

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  • After completing this lesson, you should be able to do the following: Explain the role of the DBA in tuning applications Move tables using the ALTER TABLE command Redefine a table online Create different types of indexes Build and manage index-organized tables Explain and plan OLTP, DSS, and hybrid systems

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  • .For your convenience Apress has placed some of the front matter material after the index. Please use the Bookmarks and Contents at a Glance links to access them. .Contents at a Glance About the Author ........................................................................................................ xvii About the Technical Reviewer ..................................................................................... xix Acknowledgments .......................................................................................................

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  • Database Management Systems: Chapter 2 - Indexing Structures for Files present about Types of Single-level Ordered Indexes (Primary Indexes, Clustering Indexes, Secondary Indexes); Multilevel Indexes; Dynamic Multilevel Indexes Using B-Trees and B+-Trees; Indexes on Multiple Keys.

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  • In the mid-1990’s catastrophe bonds (CAT bonds), also named as Act of God or Insurance-linked bond, were developed to ease the transfer of catastrophe based insurance risk from insurers, reinsurers and corporations (sponsors) to capital market investors. CAT bonds are bonds whose coupons and principal payments depend on the performance of a pool or index of natural catastrophe risks, or on the presence of specified trigger conditions.

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  • Author Marc Delisle Reviewers Michal Čihař Ben Dodson Kai 'Oswald' Seidler Project Coordinator Sneha Harkut Proofreader Dirk Manuel Production Coordinator Adline Swetha Jesuthas Cover Work Adline Swetha Jesuthas Editorial Team Leader Akshara Aware Project Team Leader Lata Basantani Development Editor Reshma Sundaresan Technical Editor Conrad Sardinha Indexer Hemangini Bari

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  • Index là phương tiện rất mạnh để tăng hiệu năng thực hiện của câu lệnh. Bài giảng chương 10 này sẽ cung cấp một số kiến thức liên quan đến Indexing để người học có thể nắm bắt được những tiện ích của công cụ index trong CSDL. Mời các bạn cùng tham khảo.

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  • Corporate financial managers continually invest funds in assets, and these assets produce income and cash flows that the firm can then either reinvest in more assets or distribute to the owners of the firm. Capital investment refers to the firm’s investment in assets, and these investments may be either short term or long term in nature. Capital budgeting decisions involve the long-term commitment of a firm’s scarce resources in capital investments. When such a decision is made, the firm is committed to a current and possibly future outlay of funds....

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  • MySQL Administrator's Bible-P2: With special focus on the release of the next major of MySQL, this resource provides a solid framework for anyone new to MySQL or from a background database,as well as experience MySQL administrators. The high-profile author duo provides essential coverage of the fundamentals of the coverage database management, including unique approach features MySQL database engine and functions-as well as MySQL SQL queries, data and index types, stores procedure and functions, triggers and views, and transactions.

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  • Hazardous and Radioactive Waste Treatment Technologies Handbook .Hazardous and Radioactive Waste Treatment Technologies Handbook Editor-in-Chief Chang Ho Oh, Ph.D. CRC Press Boca Raton London New York Washington, D.C. .Library of Congress Cataloging-in-Publication Data Hazardous and radioactive waste treatment technologies handbook / Chang H. Oh [editor] p. cm. (The mechanical engineering handbook series) Includes bibliographical references and index. ISBN 0-8493-9586-0 (alk. paper) 1. Hazardous wastes--Purification--Handbooks, manuals, etc. 2.

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  • The Oracle Database Administrator's Guide contains information that describes the features and functionality of the Oracle Database Standard Edition, Oracle Database Enterprise Edition, and Oracle Database Personal Edition products. These products have the same basic features. However, several advanced features are available only with the Oracle Database Enterprise Edition or Oracle Database Personal Edition, and some of these are optional.

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  • World Map Financial Derivatives Financial derivatives are financial instruments that are linked to a specific financial instrument or indicator or commodity, and through which specific financial risks can be traded in financial markets in their own right. Transactions in financial derivatives should be treated as separate transactions rather than as integral parts of the value of underlying transactions to which they may be linked. The value of a financial derivative derives from the price of an underlying item, such as an asset or index.

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