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https://issues.apache.org/jira/browse/SPARK-7324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525686#comment-14525686
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Apache Spark commented on SPARK-7324:
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User 'kaka1992' has created a pull request for this issue:
https://github.com/apache/spark/pull/5870
> Add DataFrame.dropDuplicates
> ----------------------------
>
> Key: SPARK-7324
> URL: https://issues.apache.org/jira/browse/SPARK-7324
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
>
> Similar to
> http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.drop_duplicates.html
> def dropDuplicates(): DataFrame
> def dropDuplicates(subset: Seq[String]): DataFrame
> We can turn this into groupBy(cols).agg(first(...))
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