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What are the relational operators available related to combining and splitting in pig language?

Question Posted / umesh sharma


What are the relational operators available related to combining and splitting in pig language?..

Answer / Jwala Singh

Combining Operators:n1. UNION ALL: Concatenates two or more relations horizontally without removing duplicates.n2. JOIN: Connects two relations vertically based on a common key.n3. LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN: Extend the result set of a join by including all records from one or both sides.nSplitting Operators:n1. DISTINCT: Removes duplicate rows from a relation.n2. GROUP BY: Divides a relation into sub-relations based on one or more grouping expressions.

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