Hi! It would be hard to answer this without accurate table names and an idea of what you are trying to do. Without any context, however, it does seem like rollup fields located in a separate table is a good recommendation  - Brian

Yeap, it's possible and you'd use rollup fields for it like you said.  What issues did you face while trying to do that?

https://support.airtable.com/docs/rollup-field-overview

followed all the material but rollup is everytime not working. perhaps I'm wrong with something. I need to use the sum calculated when i group my records by Id. Could you please make an example made upon my example?

What am I missing? Lookup field must to be in another tab? there are only three or four passages what I'm doing wrong? Is there somewhere an example table online?

Thanks in advance 🙂

Sure, here

Thank you very much, but I can't figure how table 1 link to grouped items automatically populates himself with grouped values...

Ah, you're going to need to use an automation for that

thanks Adam, is there a preset automation for such a task?