Anybody doing rolling sums with expression columns

[aszenz]

I recently looked at vlookup for performing rolling sums on a dataset but couldn't figure it out.

index() is not working in a for loop condition it seems

[aszenz]

I ended up adding duckdb-wasm to allow users to use sql queries for such calculations. duckdb-wasm can export query results as apache arrow which perspective can create a table from.