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.
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.
COMPETITIVE SUPPLY CHAIN AND REVENUE MANAGEMENT: FOUR ESSAYS When the peer group measure is interacted with
the choice indexin Column B, and again with additional controls in the remaining
columnsthe coefficient is indistinguishable from zero, with a negative point estimate in
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 arewith
one statistically insignificant exceptionof the opposite sign from that predicted by the
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.
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...
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.
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
II- Select a country and a region 1. Trade Agreements Depth of the agreements - key existing agreements and discussion 2.
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.
Storing User Data
There are several methods of storing user data in an Oracle database:
Note: Partitioned tables, index-organized tables, and clustered tables are covered in other courses.
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.
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
.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 .......................................................................................................
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.
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
After studying Chapter 13, you should be able to: Understand the three major discounted cash flow (DCF) methods of project evaluation and selection – internal rate of return (IRR), net present value (NPV), and profitability index (PI); explain the calculation, acceptance criterion, and advantages (over the PBP method) for each of the three major DCF methods;...
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.
Principles of Database Management Systems includes Course Overview (Physical data storage, Indexing & Hashing, Query Processing,...); Simplified DBMS structure, Why study DBMS implementation techniques?
This chapter a simplifying assumption that at once eases our computational burden and offers significant new insights into the nature of systematic risk versus firm-specific risk. This abstraction is the notion of an “index model,” specifying the process by which security returns are generated.
Bài giảng Kiến trúc cài đặt cơ sở dữ liệu - Chương 7: Chỉ mục (Index). Những nội dung chính được trình bày trong chương này gồm: Cơ bản về chỉ mục, chỉ mục: mục đích và các loại chỉ mục, kế hoạch thực thi chỉ mục, rebuild/reorganize chỉ mục. Mời các bạn tham khảo.