Sorry, I am embarking on a flight so maybe I will have to come back to you later. For the time being: https://stackoverflow.com/questions/3413459/designing-sql

Sorry, I am embarking on a flight so maybe I will have to come back to you later. For the time being: https://stackoverflow.com/questions/3413459/designing-sql-database-to-represent-oo-class-hierarchy https://stackoverflow.com/questions/3413459/designing-sql-da... - mine is the "chosen" answer and I hope will give you a pointer in the right direction.