When is it preferable to use a dense index rather than a sparse index? Explain your answer.
Answer to relevant QuestionsSince indices speed query processing, why might they not be kept on several search keys? List as many reasons as possible.For each B+-tree as shown below show the form of the tree after each of the following series of operations:a. Insert 9.b. Insert 10.c. Insert 8.d. Delete 23.e. Delete 19.Construct a B+-tree for the following set of key ...Give pseudocode for deletion of entries from an extendable hash structure, including details of when and how to coalesce buckets. Do not bother about reducing the size of the bucket address table.Consider the following SQL query for our bank database select T.branch-name from branch T, branch S where T.assets > S.assets and S.branch-city = “Brooklyn” Write an efficient relational-algebra expression that is ...The hash join algorithm as described in Section computes the natural join of two relations. Describe how to extend the hash join algorithm to compute the natural left outer join, the natural right outer join and the natural ...
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