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Consider a relation s over the attributes A and B with the following characteristics:
(a) Assuming that the aforesaid index on A is unclustered, estimate the number of disk accesses needed to compute the range query σA>1000 ^ A<6000 (s).
(b) What would be the cost if the above index were clustered? Explain your reasoning.
The Transactions- A transaction is definite as the unit of work in a database system. Database systems that deal with a huge number of transactions are also termed as transaction p
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Horizontal Fragmentation- Horizontal fragmentation groups together the tuples in a relation that are collectively used by the main transactions. A horizontal fragment is produced b
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sir, could anybody help me in getting complete information about the mentioned topic
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