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State true or false: Estimation of the size of the result of a join is not possible(a) True(b) FalseI have been asked this question in an internship interview.The origin of the question is Estimating Statistics of Expression Results in portion Query Processing and Optimization of RDBMS

Answer»

Right option is (b) False

To explain: Estimation of the RESULT of a join is possible and can be done USING the Cartesian product and intersections of the two relations. It is more complicated than estimating SIZE of a selection.



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