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- W166355824 abstract "In a relational database model, checking the contraints of join dependency involves examining a set of n tuples and solving m1 constraint equalities. We derive a scheme called the (n,m)-JD in which the number of constraint equalities is reduced to m2, by forming cyclic combinations of the (disjoint) elements of the partition and increasing the number of intersection operations to obtain the projections in the constraint equalities. The reduced set of constraint equalities results in less elementary checking operations and hence an overall increase in efficiency in the normalization effort. The relationship among (n,m)-JDs of various degrees and orders is also studied and formalised." @default.
- W166355824 created "2016-06-24" @default.
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- W166355824 date "1991-01-01" @default.
- W166355824 modified "2023-09-26" @default.
- W166355824 title "An improved join dependency for efficient constraint checking" @default.
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- W166355824 doi "https://doi.org/10.1007/3-540-54029-6_167" @default.
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