Question
What are the relational operators available related to Grouping and joining in pig language?
Answers
Grouping and Joining operators are the most powerful operators in pig language. Because core MapReduce creation for grouping and joins are very typical in low-level MapReduce language.
JOIN
GROUP
COGROUP
CROSS
JOIN is used to join two or more relations. GROUP is used for aggregation of a single relation. COGROUP is used for the aggregation of multiple relations. CROSS is used to create a cartesian product of two or more relations.   Your Comment




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