Hi Simon, I was thinking that this could be implemented, but I don't know how. I imagine creating a dynamic column containing the sum of the "size_t" starting from the older row (reverse order) But how to create this dynamic column that aggregates data from other rows? Using a virtual table? I am really curious about this -- EDIT -- OK, it appears that using window functions (SUM OVER) could help, as described here: [https://stackoverflow.com/a/58339386/4626775](https://stackoverflow.com/a/58339386/4626775)