Do Layered Views/Relations Preserve Sort Order ?

Hi All,

When there are several views defined on top of each other, are SELECTs 
on views that do not specify a SORT order guaranteed to preserve the 
cumulative sort order of the lower-level views ?

Is the answer true for any arbitrarily large set of layered views?

Is the answer the same if the layers of relations are a mix of views and 
tables ?


Best, Charles