I wouldlike to know if it’s possible to have in the column “test” all the items which are in the same period. For example in the first row of the colum “test” the result would be “FRT54522” because “FRT54522” has a period in common with “FRT5678C”.
Hey Matthieu! Airtable formulas only have access to one row of data at a time. So a formula executing in one row has access to any column values it needs, but not any other rows. The exception is the functionality that linked records/lookups afford, but I don’t think that helps in this case.
The alternatives you’re left with are probably:
filtering, sorting, or grouping your list by date ranges
write a script to populate TEST whenever you click a button
rig up a third party integration that automatically scours for updates to the base, and updates the TEST column as necessary