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Are all relations in bcnf provide lossless join or can any relation be bcnf but not lossless join at the same tiem?

Is there a way to show that a relation that is not in bcnf but NOT lossless join.

Flamme
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1 Answers1

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There are schemas in which no decomposition to 3.5NF is dependency-preserving. See (Tsou 1982) for an example.

Glorfindel
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BadZen
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