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Q 1 . Consider a relation s ( A , B ) with the following characteristics: s has 7 0 0 , 0 0 0
Q Consider a relation sAB with the following characteristics: s has tuples with tuples per disk block s has an index on attribute A with index height xie the index has nodes on levels The values that the attribute A takes in relation s are integers which are uniformly distributed in the range Uniformly distributed there are roughly tuples for each A value.a Assuming that the index on A is a secondary index, estimate the number of disk block accesses needed to compute the query sigma As
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