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What is the difference between WHERE and HAVING clauses?.
Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
distributed quey processing
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brief history,definition,current trends and future trends if any of data fragmentation
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what problems are raised by the database? why is it so controversial? why is data quality an issue?
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1.Why we need data mining? Give an example to illustrate your answer. 2. Why data mining is considered as "misleading name"? 3. Distinguish the difference between database an
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