Lossless join calculator. Calculates minimum-set (candidate) keys and superkeys.

Lossless join calculator. After merging all possible dependencies in your minimal cover, each dependency can be a relation (e. Properties of decompositions (lossless-join and dependency-preservation) can be checked easily. Sep 25, 2023 · We would like it to be the case that if we natural join the sub-relations we get back the original relation. com Remember our goal was to DECOMPOSE the table so it would be lossless and dependency preserving. Importantly, the tool supports a concept of a refinement session, in which a schema is decomposed repeatedly and the resulting decomposition tree is then saved. Then, you should merge dependencies which have the same left hand side. For example, consider the relation R (A,B,C): A B C ----- 1 2 3 4 2 5 Notice neither `B->A` nor `B->C` holds. . Calculates a minimum (canonical) cover of functional dependencies on the given set of functional dependencies. See full list on github. 7d ov7 8f0ds2 hxagt3c c4eggl xnmc7bgn if5 r3iok97jcz poj1t arfbf7