Now this doesn't hold true:

I am very pleased that UMG developer made a thorough explanation in the previous comment as it was exactly my thought but I couldn't had written it on my phone.

And to add some value to it I think other than being more precise with the resources option you could have thrown in an option relating to indexes or inserts (w/ or wo/ instead of triggers), language dependent functions...

I myself have written a calendar table w/ one physical date column, one computed persisted integer column and a whole bunch of non-persisted columns calculated from the date column.

It