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Ajax and DB
Ajax and DB

... data in the last_name column for any values starting with 'Stan' and ending with zero or more characters afterwards. The LIKE search is not case sensitive, so it will accept anything starting with 'stan' as well. The WHILE loop then prints out the results found if both equations are found TRUE. ...
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Oracle/SQL Tutorial - Department of Math/CS

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View this book as PDF

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Module 2: Managing and Monitoring Dynamic Host

... Guidelines for Securing the DHCP Database To further secure the DHCP database: Consider changing the default permissions of the DHCP folder Provide only the minimum permissions required to users to enable them to perform their task Provide Read permissions to users responsible for analyzing DHCP se ...
SilkRoute : A Framework for Publishing Relational Data - CS
SilkRoute : A Framework for Publishing Relational Data - CS

... will match exactly a proprietary relational schema. In addition, one may want to map one relational source into multiple XML documents, each of which conforms to a different XML schema. A second requirement is that a publishing framework must be selective, i.e., only the fragment of the XML document ...
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... • Error Handling: PL/SQL handles errors or exceptions effectively during the execution of a PL/SQL program. Once an exception is caught, specific actions can be taken depending upon the type of the exception or it can be displayed to the user with a message. ...
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... ‰ Transactions is the execution of a unit-of-work that accesses on or more resources, usually databases ‰ A unit-of-work is a set of activities that relate to each other and must be completed together ‰ The objective with transactions is to execute an unit-of work that results in a reliable exchange ...
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... Clusters (RAC). They should, however, be aware that there is an alternative. IBM Informix offers enterprise-class database availability in a significantly less complex, less expensive manner. IBM Informix is one of the world’s most widely used databases. Its more than 200,000 customers range from Fo ...
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... database. A Microsoft Access database named Cape-Codd.accdb is available on our Web site (www.pearsonhighered.com/kroenke) that contains all the tables and data for the Cape Codd Outdoor Sports sales data extract database. Also available on our Web site are SQL scripts for creating and populating th ...
Relational Databases and Microsoft Access
Relational Databases and Microsoft Access

... Various texts have been used with some success but were felt lacking for various reasons such as: (1) being workbook style with extensive tutorial lessons, (2) being too focussed on a technology, (3) having design material that did not fit well with more advanced courses, and (3) being so expensive ...
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System Administration Guide Volume 2

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... As can be seen, these constraints already dismiss a lot of interesting patterns. However, it is still possible to discover all frequent conjunctive queries, but then, we need to run the algorithm for every possible key atomic formula with the least restrictive declarative language bias. Of course, u ...
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the relational database model: introduction
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... not work in the PC environment, for two reasons. One was that these DBMSs were simply too large to store and use on the early PCs. The other was that they were too complex to be used by the very broad array of noninformation systems professionals to whom the PCs were targeted. Today, the relational ...
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... The PROV standard [12] enables exchange of provenance information between systems by providing a standardized, extensible representation of provenance graphs. For the first time it is possible to track the provenance of an entity during its entire lifecycle while it (and its dependencies) are proces ...
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... disk that contain your data files. Remember, redo log activity will increase when updates are made to your data files - thus there is a direct relationship to activity on the data disks and activity on the redo log disks. Keep them separated so that there is no contention. Also, log switches are exp ...
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Multimedia Databases

Multimedia Databases - IfIS - Technische Universität Braunschweig
Multimedia Databases - IfIS - Technische Universität Braunschweig

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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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