Suppose you have a spatial database that supports region queries (with circular regions) but not nearest neighbor queries. Describe an algorithm to find the nearest neighbor by making use of multiple region queries.
Answer to relevant QuestionsSuppose you want to store line segments in an R-tree. If a line segment is not parallel to the axes, the bounding box for it can be large, containing a large empty area.• Describe the effect on performance of having large ...List three factors that need to be considered in query optimization for mobile computing that are not considered in traditional query optimizers.Consider a main-memory database system recovering from a system crash. Explain the relative merits of• Loading the entire database back into main memory before resuming transaction processing• Loading data as it is ...Consider a multidatabase system in which it is guaranteed that at most one global transaction is active at any time, and every local site ensures local serializability.a. Suggest ways in which the multidatabase system can ...Consider the data in Exercise 15-3. Use the normal approximation for the sign test to test H0 = 2.5 versus H1 < 2.5. What is the P-value for this test?
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