Group-by Questions

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Find index of max() after groupby

Is there a possibility to find the index after a groupby. so in other words i use a groupby function to find max values, but i would like to find

Division in group by SQL table

I have the following sql code select (count(*) filter (where has_a)) as count_a, count(*) as total_count, process_date from(select
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Pandas, filter by count

I'm trying to filter a dataframe by the number of occurrences for id. id date 1 2018-05-06 1 2018-05-08 1
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YOY growth based on ID

I am trying to calculate year or year growth for a variable in a pandas dataframe. my data looks like this:
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Pandas dataframe group by list

I have the following dataframe with names of people and their abbreviation. the aim is to perform name disambiguation: names

Long to wide format with GroupBy

I have been trying to figure out how to do the following with no success. i tried sampling, grouping ... got stuck. i have the following
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