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I have a situation where i have list of rows with multiple columns and have to group by with a lookup key which is a unique column in all rows .. I have to sum up values of a given column (say x) for all the rows from the lookup key (say lookup_1) in scala only using group by aggregate or any other method available .. I can't convert to dataframe and use aggregate ..
I am sorry if I can't put code because policy doesn't allow so ..
Your quick help would be appreciated or guidance !!!