Hi,
is there a simple way in ArcGis Pro of combining multiple attribute1 values (with comma as a delimiter) into one cell based on attribute2 values. Here is a simple example:

As a result, I would like to get a table with two lines
attr2 | attr1
1 | "1"
2 | "2, 5"
Thank you for any help. I believe there is some very simple solution, but I did not find it 😕
Best from
T.