Optimizers use __________ to reduce the cost of optimization.(a) Analyzers(b) Statistics(c) Heuristics(d) CachesI have been asked this question in a national level competition.I need to ask this question from Choice of Evaluation Plans in section Query Processing and Optimization of RDBMS

Optimizers use __________ to reduce the cost of optimization.(a) Analy

1.	Optimizers use __________ to reduce the cost of optimization.(a) Analyzers(b) Statistics(c) Heuristics(d) CachesI have been asked this question in a national level competition.I need to ask this question from Choice of Evaluation Plans in section Query Processing and Optimization of RDBMS
Answer» Correct ANSWER is (c) Heuristics Explanation: Cost BASED optimizers may be expensive as EXPLORING SPACE of all possible PLANS might prove to be costly. So, optimizers use heuristics to reduce the cost of optimization.

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