Question: Given that intersect is a special case of join why
Given that intersect is a special case of join, why do not both operators give the same result when applied to no relation at all?
Answer to relevant QuestionsWhich (if any) of the following expressions are equivalent?(a) Summarize r per r ( ) add count as ct (b) Summarize r add count as ct(c) Summarize r by ( ) add count as ct (d) Extend TABLE-DEE add count (r) as ct Get all pairs of city names such that a supplier in the first city supplies a project in the second city.Get supplier number for projects supplied with part P1 in an average quantity greater than the greatest quantity in which any part is supplied to project J1.Modify your algorithm from Exercise 24.3-6 to run in O ((V + E) lg W ) time. (Hint: How many distinct shortest-path estimates can there be in V - S at any point in time?)A sequence is bitonic if it monotonically increases and then monotonically decreases, or if it can be circularly shifted to monotonically increase and then monotonically decrease. For example the sequences 1, 4, 6, 8, 3, ...
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