Hi how to calculate percentile of a column in a DataFrame? I cant find any
percentile_approx function in Spark aggregation functions. For e.g. in Hive
we have percentile_approx and we can use it in the following way
hiveContext.sql("select percentile_approx("mycol",0.25) from myTable);
I can see ntile function but not sure how it is gonna give results same as
above query please guide.
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