Arc GIS 10.1 Set Unique identifier field

Discussion created by johanness on Oct 2, 2012
Latest reply on May 31, 2019 by cmm30

I wanted to perform a Grouping Analysis in ArcGIS 10.1. When opening the analysis tool and trying to select a unique ID field the entries where all blanck. I therefore thought, that mayber the unique identifier field wasn't set. Searching the Arc GIS Help Ressources I found this site that tries to explain how to set the Unique Identifier.
When trying to follow the suggested steps i couldn't set the field because after opening the "source-tab" I could not find anything similar to the mentioned "Change Query" field. The only thing I found is the "set data source" field.
Afterwards i checked all the fields in the table and I found the "FID" in the first collumn. Isn't this field thought to be such a Unique ID field?
Can anyone help me how to manually set this field so I can perform the grouping analysis.
Thx in advance!