1.

The merge join can be used to compute(a) Natural joins(b) Equi joins(c) Both the mentioned(d) None of the mentionedThe question was posed to me in a job interview.My question is taken from Join and Other Operations in section Query Processing and Optimization of RDBMS

Answer»

The CORRECT answer is (c) Both the mentioned

To explain: The merge join can be USED to COMPUTE both equijoins and natural joins. This is also called as the sort-merge-join algorithm.



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