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https://issues.apache.org/jira/browse/SPARK-8992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14649832#comment-14649832
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Apache Spark commented on SPARK-8992:
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User 'aray' has created a pull request for this issue:
https://github.com/apache/spark/pull/7841
> Add Pivot functionality to Spark SQL
> ------------------------------------
>
> Key: SPARK-8992
> URL: https://issues.apache.org/jira/browse/SPARK-8992
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.4.0
> Reporter: Richard Williamson
>
> SQLServer and other databases provide capabilities to transpose data from
> columns to rows and rows to columns, the later is very useful for analytic
> use cases like turning rows into feature columns for an MLlib model. Here is
> a reference for the SQLServer implementation:
> http://sqlhints.com/2014/03/10/pivot-and-unpivot-in-sql-server/
> Additional Referenced Request:
> http://stackoverflow.com/questions/30244910/pivot-spark-dataframe
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