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Keys play a fundamental role in all data models. They allow database systems to uniquely identify data items, and therefore , promote efficient data processing in many applications. Due to this, support is required to discover keys. These include keys that are semantically meaningful for the application domain, or are satisfied by a given database. We study(More)
Referential integrity is fundamental for data processing and data quality. The SQL standard proposes di↵erent semantics under which referential integrity can be enforced in practice. Under simple semantics, only total foreign key values must be matched by some referenced key values. Under partial semantics, total and partial foreign key values must be(More)
Developing an intelligent recommendation system is a good way to overcome the problem of overloaded product’s information provided by the e-commerce enterprises. This paper proposes a new hybrid recommendation methodology, called INORM, based on recommendation methods and costumer navigational and behavioral algorithms to enhance the recommendation(More)
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