Give Map reduce algorithms to perform Grouping and Aggregation by Map Reduce.

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written 6.9 years ago by

vivekrite • 100

modified 2.6 years ago by

pedsangini276 • 4.8k

big data analytics

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written 2.6 years ago by

pedsangini276 • 4.8k

Group rows based on some set of columns and apply some aggregation (sum, count, max, min, etc.) on some column of the small groups that are formed. This corresponds to GROUP BY in SQL.

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