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D3K
Advocate II
4 years ago
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Index incrementation inside a group of values. Power Query

Hey Everyone!

 

Can't figure it out, how to find a solution for the next case. 

We got a list of invoices, that content one or a few items inside.

And then we number a rows with INVOICES. If invoice has more then one record, it's number repeats.

The question is how to add such column in POWER QUERY (column B on the image), that will contain kind of internal index for every invoice? And it has to be started from 20 and increments by 20 for every next row.

New invoice - countintg starts from 20 again.

Please the image below

Any help will be highly appresiated! Thanks a lot!