I have an index/sequence column already, so if I could feed in the sequence to the Group_concat_d, that would be helpful. Thanks though! Really loving what it does do already. EDIT: Managed to find ...

I'm going to develop a simple application to compare two dataframe with given keys (multiple index columns). I need to generate 3 dataframe as below, final_1 : contain all rows in df1, plus empty row ...