橱柜 发表于 2025-3-21 16:12:31
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https://doi.org/10.1007/978-3-642-23441-5axiomatization; constraints; dependencies; query optimization; related databases; schemata; view updates火车车轮 发表于 2025-3-22 02:38:39
978-3-642-23440-8Springer-Verlag GmbH Berlin Heidelberg 2011唤起 发表于 2025-3-22 05:53:39
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Characterization of Optimal Complements of Database Views Defined by Projection,ing when the main schema has a governing join dependency; that is, a join dependency which implies all others. Four distinct classes of such governing dependencies are identified, corresponding to ordinary complements as well as three distinct types of dependency-preserving complements.提升 发表于 2025-3-23 05:36:57
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