Question: Histograms are traditionally constructed on the values of a specific attribute (or set of attributes) of a relation. Such histograms are good for avoiding data

Histograms are traditionally constructed on the values of a specific attribute (or set of attributes) of a relation. Such histograms are good for avoiding data distribution skew but are not very useful for avoiding execution skew. Explain why.

Now suppose you have a workload of queries that perform point lookups. Explain how you can use the queries in the workload to come up with a partitioning scheme that avoids execution skew.

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