Update anomaly - PowerPoint PPT Presentation

Transaction Management: Concurrency Control

Transaction Management: Concurrency Control. CS634 Class 17, Apr 7, 2014. Slides based on “Database Management Systems” 3 rd ed , Ramakrishnan and Gehrke. Modeling Transactions. User programs may carry out many operations … Data modification and retrieval Prompting user for input

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648 views • 29 slides

Functional Dependence

Functional Dependence. In a relation including attribute A and B, B is functional dependent on A if, for every valid occurrence, the value A determines the value B An occurrence can not be used to show that a dependency is true, only that it is false A and B can be composite

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466 views • 12 slides

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