How can I bring together data that I have previously divided up ?

[elaadani]

Hey, everybody, first of all, thank you very much for all the help. I’m a beginner at KNIME so there’s a lot of things I don’t handle yet.

First of all, I have a dataset that I’ve divided in two, according to some columns that I work separately

This is what I do, but with a Ungroup, I lose the row id and I don’t know how to put the data back together

I’d appreciate your help. Thank you very much in advance

[AlexanderFillbrunn]

Hi,
You can use the RowID node to add the current RowID as a normal column. Then later, after merging, you can use the same node to restore the RowID from that column.
Kind regards,
Alexander