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1) What is the man cost in oost-based query optimization? How is it 2. What is the selection cardinality and how is it calculated? 3)

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1) What is the man cost in oost-based query optimization? How is it 2. What is the selection cardinality and how is it calculated? 3) The cost for a Join operation is much smaller for sort-merge. Why do you 4) For a nestes loop Join, what is the cost to perform the double loop

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