How to add string value to data column?

Hi @supermanPunch @sb001

I solved it myself about 15 minutes ago…

So my build data table must have a value, and when write to data table, exclude headers MUST unchecked or else my expected value is not coming out. Here’s my expected value :

Month is header, test123 is the value of the data table (the months on each column is as expected) but how to remove the column1 column 2 and the value Test123. Maybe can be helped?