Hi Veronique, would the following work?

1. We create rollup fields in Ventes 2021 of both Date de parution and Date 6 mois
2. In Ventes 2021, we create a formula field that checks whether the record’s Date value is between the rolled up values of Date de parution and Date 6 mois from the previous stem
3. In the Titres table, we modify Ventes 6 mois’s to conditionally filter on the formula field from step 2?

Hi @Adam_TheTimeSavingCo

What would be the formula for .2? I’m trying a SUMIF but it doesn’t seem to work.

Thank you so much!

Hi Veronique, I would use this formula:

IF(
  AND(
    Date <= {End Date (from Titres)},
    Date >= {Start Date (from Titres)}
  ),
  1
)

I’ve also set it up here for you to have a look at

To view the formulas, you can duplicate the base by clicking the title of the base at the top of the screen, then the three horizontal dots on the right, and then the “Duplicate Base” button.

Thank you so much @Adam_TheTimeSavingCo