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Size estimation can be done for which of the following processes?(a) Projection(b) Aggregation(c) Set operation(d) All of the mentionedThe question was asked in semester exam.The above asked question is from Estimating Statistics of Expression Results in portion Query Processing and Optimization of RDBMS

Answer»

Right choice is (d) All of the mentioned

The best explanation: Size estimation can be done for projection, aggregation, set operations, join operations and ALSO the SELECTION OPERATION.



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