> query that referenced n users plus their orders is probably a reporting type query No, there are enough other valid cases, e.g. display last customers and th

> query that referenced n users plus their orders is probably a reporting type query No, there are enough other valid cases, e.g. display last customers and their orders or some simple "others have also bought". In practice you will need to join a lot spontaniously and can not just defer that to a data warehouse.