Question: Use Armstrong s axioms to prove the soundness of the rule
Use Armstrong’s axioms to prove the soundness of the decomposition rule.
Answer to relevant QuestionsUse Armstrong’s axioms to prove the soundness of the pseudotransitivity rule.Given the database schema R (a, b, c), and a relation r on the schema R, write an SQL query to test whether the functional dependency b → c holds on relation r. Alsowrite an SQL assertion that enforces the functional ...Give an example of a relation schema R` and set F` of functional dependencies such that there are at least three distinct lossless-join decompositions of R` into BCNF.Explain how dangling tuplesmay arise. Explain problems that theymay cause.Using ODMG C++, give schema definitions corresponding to the E-R diagram in Figure, using references to implement relationships.
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