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Using Databases – OpenOffice.org Base
Using Databases – OpenOffice.org Base

Implementing SPARQL Support for Relational Databases and Possible Enhancements
Implementing SPARQL Support for Relational Databases and Possible Enhancements

... single model. It is often desirable that a database server supports multiple stores that keep data independent of each other. Most current SPARQL server implementations include support to handle distinct models. While named graphs try to address this problem, it is often favorable to have fully dist ...
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... © 2010 Bennett, McRobb and Farmer ...
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... The structure of XMASS. (Hallberg et al, 2006). ....................................9 Use cases from a developer perspective. ................................................12 Use cases from a user perspective. ..........................................................14 A generalized view of an as ...
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...  Relational Database Management System – a database system made up of files with data elements in two-dimensional array (rows and columns). This database management system has the capability to recombine data elements to form different relations resulting in a great flexibility of data usage.  Dat ...
Advantage Database Server for Visual FoxPro
Advantage Database Server for Visual FoxPro

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UNIVERSITY OF NAIROBI SCHOOL OF COMPUTING AND INFORMATICS

... The promise of a commercial competitive edge via the logical integration of existing database systems, has attracted intense interest. A major assumption has been that component databases have a-prior knowledge of remote schema. However, this is only reasonable provided the number of participating d ...
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Using SAP MaxDB Database Manager
Using SAP MaxDB Database Manager

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... Solution Overview The goal of this work to was to build, test, and document a near-real life enterprise computing environment consisting of several well-known business applications all running on a single converged infrastructure platform. When dealing with mixed or even individual workloads, the pr ...
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... modeled. The model then performs a series of calculations, which have been carefully developed to accurately reflect vehicle operating processes, such as cold start or extended idle, and provide estimates of bulk emissions or emission rates. Specifying the characteristics of the particular scenario ...
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... tagging each insertion by its perturbation id, and ignoring an insertion if an entry with the same id already exists. However, this workaround fails if we want to find streaks that are dominated or matched at most once (with the pruning query against the cache adjusted accordingly). Suppose (x, y) i ...
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... With adoBooks .ConnectionString="Provider=Microsoft.Jet.OLEDB.3.51;" & _ "Persist Security Info=False;" & _ "Data Source=" & App.Path & "\AVB.mdb; " & _ "Mode=Read" .CommandType=adCmdTable .RecordSource="Patient" .Refresh End With ...
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... Can still get data corruptions  Human errors / software errors  Only one logical copy of data  Only one logical copy of application / Oracle software ...
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Oracle Exadata Storage Expansion Rack X3-2

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Answers to Chapters 7, 9 and 10
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... How many database requests can you identify for an inventory update for both PRODUCT and PART? There are two correct answers 4 or 2. Depending in how the SQL statements are done. ...
< 1 ... 43 44 45 46 47 48 49 50 51 ... 459 >

Concurrency control

In information technology and computer science, especially in the fields of computer programming, operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.Computer systems, both software and hardware, consist of modules, or components. Each component is designed to operate correctly, i.e., to obey or to meet certain consistency rules. When components that operate concurrently interact by messaging or by sharing accessed data (in memory or storage), a certain component's consistency may be violated by another component. The general area of concurrency control provides rules, methods, design methodologies, and theories to maintain the consistency of components operating concurrently while interacting, and thus the consistency and correctness of the whole system. Introducing concurrency control into a system means applying operation constraints which typically result in some performance reduction. Operation consistency and correctness should be achieved with as good as possible efficiency, without reducing performance below reasonable levels. Concurrency control can require significant additional complexity and overhead in a concurrent algorithm compared to the simpler sequential algorithm.For example, a failure in concurrency control can result in data corruption from torn read or write operations.
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