UnStack dataframe with aggregated string column

General Usage
2

Yes, it is possible:

julia> combine(groupby(df, [:x, :y]), :z => x -> join(sort(x), ","))
2×3 DataFrame
 Row │ x       y       z_function
     │ String  String  String
─────┼────────────────────────────
   1 │ a       x       l,m
   2 │ b       y       n
1 Like