Good example too, but this one can with benefit be written using the JOIN FOREIGN syntax, you just need to give the foreign keys suitable names such as e.g. "sh

Good example too, but this one can with benefit be written using the JOIN FOREIGN syntax, you just need to give the foreign keys suitable names such as e.g. "shipped_date", "order_date", "received_date". Or, to remind you of which is the referenced table, perhaps you want to include it in the names, and the names would be "shipped_date_calendar", "order_date_calendar", "received_date_calendar", but personally I would prefer just "shipped_date" or perhaps even just "shipped".