Why JOIN operator is used in pig?

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Hi,

Can anyone explain what JOIN operator is and how does it work in pig?

May 6 in Big Data Hadoop by disha
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1 answer to this question.

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Hey,

In Apache pig, JOIN operator is used to combine records from two or more relations. While performing a JOIN operation, we declare one or group of tuples from each Relation, as keys. When these keys match, the two particular tuples are matched. JOIN can be of following types:

  • Self-join
  • Inner-join
  • Outer-join
answered May 6 by Gitika
• 25,340 points

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