- be able to put the projection in a varable and reuse it (and I think orm people might love it)
- have a quick way to forward the the non-aggregated fields of projection to a group by (maybe with the aforementionned variables)
- Does this[1] solve the group by wish?
- Depending on what you mean by projection, maybe this[2] or this[3]?
[1] https://duckdb.org/docs/api/python/relational_api#aggregatee...
[2] https://duckdb.org/docs/api/python/relational_api#projectexp...
[3] https://duckdb.org/docs/api/python/expression#column-express...