A Proof Procedure for Data Dependencies
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Database states and their tableaux
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The theory of joins in relational databases
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Testing implications of data dependencies
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On the Complexity of Testing Implications of Functional and Join Dependencies
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Testing satisfaction of functional dependencies
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Horn clauses and database dependencies
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First order logic formalization for functional, multivalued and mutual dependencies
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The inference problem for template dependencies
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The Implication Problem for Data Dependencies
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Horn tables-an efficient tool for handling incomplete information in databases
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Polynomial time designs toward both BCNF and efficient data manipulation
SIGMOD '90 Proceedings of the 1990 ACM SIGMOD international conference on Management of data
Constant-time-maintainable BCNF database schemes
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Independence-reducible database schemes
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Constant-time maintainability: a generalization of independence
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Semantics for null extended nested relations
ACM Transactions on Database Systems (TODS)
Regular Article: The nested universal relation data model
Proceedings of the 30th IEEE symposium on Foundations of computer science
Independence-reducible database schemes
Proceedings of the seventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
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Journal of Computer and System Sciences
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Two notions of dependency satisfaction, consistency and completeness, are introduced. Consistency is the natural generalization of weak-instance satisfaction and seems appropriate when only equality-generating dependencies are given, but disagrees with the standard notion in the presence of tuple-generating dependencies. Completeness is based on the intuitive semantics of tuple-generating dependencies but differs from the standard notion for equality-generating dependencies. It is argued that neither approach is the correct one, but rather that they correspond to different policies on constraint enforcement, and each one is appropriate in different circumstances. Consistency and completeness of a state are characterized in terms of the tableau associated with the state and in terms of logical properties of a set of first-order sentences associated with the state. A close relation between the problems of testing for consistency and completeness and of testing implication of dependencies is established, leading to lower and upper bounds for the complexity of consistency and completeness. The possibility of formalizing dependency satisfaction without using a universal relation scheme is examined.