Query evaluation techniques for data integration systems
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چکیده
منابع مشابه
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The task of a data integration system is to combine the data residing at different, autonomous sources, and providing the user with a unified view of these data, called global schema. Users query the global schema, while the system carries out the task of suitably accessing different sources and assembling the data retrieved at each source into the final answer to the query. Since sources are i...
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تاریخ انتشار 2004