Whatever view you want it is always a single query for the data in a relational database. In some ways that is the key difference: store the data normalised, q

Whatever view you want it is always a single query for the data in a relational database. In some ways that is the key difference: store the data normalised, query for the view you want. And anyway, I have yet to see any real world business app which is "a single customer view" and even if is, it quickly expands and changes as the business does.