I've tried, I get this when trying to add dataset_one and two:

TypeError: unsupported operand type(s) for +: 'Rows' and 'Rows'

I "feel" there is something to do before adding, like convert to
another datatype, but my incompetence limits me...

(I hope I dont stretch my luck with all this question...)

> You have to merge them in a list and sort them at the Python/web2py
> level.
>
> You may be able to do
>
> dataset_three=(dataset_one+dataset_two).sort(lambda row:
> row['sortfilename'])
>
> assuming both tables have the same sortfiledname and have similar
> record structures. Try and let us know.

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