Union, intersection, product, and natural join are all both commutative and associative. Verify these claims.
Answer to relevant QuestionsOf Cod’s original set of eight operators, union, difference, product, restrict, and project can be considered as primitives. Give definitions of natural join, intersect, and (harder) divide in terms of those primitives.Let r be the relation denoted by the following expression; SP group () as x Show what r looks like, given our usual sample value for SP. Also, show the result of; r ungroup xGet the total number of projects supplied by supplier S1.Get project number for projects supplied with at least all parts available from supplier S1.As it appears above, the Floyd-War shall algorithm requires Θ (n3) space, since we compute for d (k) i, j, k = 1, 2,...,n. Show that the following procedure, which simply drops all the superscripts, is correct, and thus ...
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