Figured that out pretty quickly. 
No where clause on GetRows would return all? I seriously don’t know the answer to this.
Again, don’t care about the upload at this time. Running a bunch of DMTs is my plan for now.
That’s why a csv. You can open it in Excel.
One thing to keep in mind is that the result of GetRows may not map 1:1 with your DMT template. You may have to rename some columns
DMT can consume Excel sheets also, sadly the last time I looked it can’t consume anything other than Sheet 1. Leading 0’s is a problem (apparently there is a new option in Excel to enable not truncating leading zeros)
Hmmmm. Now that would be useful to be able to DMT in parallel by loading multiple sheets at the same time… I know you can manually run the same DMT template with different data at the same time.
Even before the fix, if you want a string, you can enter as a formula with quotes:
...,="0801",...
Or format the whole sheet to have the cells be Text and then paste in.
I have always used that approach, leading zeros option in Excel also handy for copy to Excel…
And it’s AWESOME!!! 
Of course they introduce it right after I’ve reduced my CSV consumption to near zero.
How does the Epicor ERP Analyzer / Cirrus program do it? Maybe there’s something that can be leveraged, or turned into a feature for us lowly customers. Ideas?
Here is your tool. We could expand this a lot.
https://www.epiusers.help/t/dump-database-table-to-csv-file-in-epicordata-folder/117317?u=klincecum