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Preserving Data Privacy with Record Retrieval using Visual
Preserving Data Privacy with Record Retrieval using Visual

... from unauthorized users. The work includes encryption, selective retrieval, retrieving records with matching markers, etc. The proposed system search records from queries in the encrypted domain itself. Findings: All application related operations like checking for some threshold value, searching fo ...
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... known as the conceptual schema • This structure needs to meet the requirements of the users. This is what we will work on when we design databases. • It makes the data available to any application (or several at once) without the designer needing to know the exact location of the data – the data is ...
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... A typical SQL statement filters the ____________ of a database, thereby presenting only those that meet criteria. ...
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Chapter 15 - Emunix Emich
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...  Updating by multiple computers: allows multiple updates on the same data at multiple sites – Three types of distributed update conflict can occur: • Loss of uniqueness • Lost updates due to concurrent transactions • Updates of deleted data ...
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... Fig. 11 – Button “Execute Query” allows the user to be interactive with a query while the button “Run Store” powerfully runs the whole batch of queries without any interaction. Make sure existing queries are correct syntactically before clicking this button. ...
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... Footer sections can appear in several places. For example, you can create group footers that display sums, counts, or averages for a group of data. Build a database VI: Create reports for a new Access database ...
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... information about the update will still be captured. Diff: 2 Page Ref: 306 12) What is a checkpoint? Answer: A checkpoint is a part of a recovery log. When a checkpoint is created, all updates recorded in the recovery log—and as a result any updates to data stored in memory—are written to the databa ...
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... The default configuration of NNM’s data warehouse to an external database assumes a database installed on the same machine as NNM. While this configuration is often adequate, there are circumstances that would make the separation of the NNM application and the database server desirable. This white p ...
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... limitations, only the ingoing data from medical devices to the disk subsystem will be examined in this thesis. This thesis is divided into five parts. In the course of this project it is important to study what components are involved in a general computer system. The study of application work-flow ...
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... A file is a collection of related records. Generally, all the records in a file are of same size and record type, however, it is not always true. The records in a file may be of fixed length or variable length depending up on the size of the records contained in a file. The telephone directory conta ...
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... – If the state of an entity was being updated by a transaction at the time the container crashed, the entity’s state is automatically reset to the state of the last committed transaction – An application program can create an entity bean, then be stopped and restarted, and again find the entity bean ...
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... expensive. On the other hand, there is the suspicion that this not analyzed stored data can hide useful information. This leads to the urgent need of designing semi-automated methods to discover this sort of hidden information. The research area that has been developed to meet such requirement is kn ...
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Practice 3: Managing an Oracle Instance - MCST-CS
Practice 3: Managing an Oracle Instance - MCST-CS

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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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