Select a combined unique ID as ref to merge import CSV data

[Thierry_SAPPIA]

Hi everybody,

I really enjoy Airtable but I need help ; I tried to search into the forum without being able to find a solution.
I have different tables structuring a kind of OLAP application (entities, customers, Phase, Months, etc…)
In a Data table (used to import datas), I tried to merge data by selecting an unique ID created with formula (association of 4 datas).

Unfortunatly, Airtable does not allow to select the result of formula as identity

My table has significant number of colums and an only selection is not sufficient to make the job.
At last, I am not at all, an expert in scripting to automate this process.

Do you have any ideas, suggestion to help ?
Thanks a lot