As a novice, it seems like there are two different, but related concepts: hidden columns and invisible columns.
What's the difference between the two?
Background:
I'm wondering if a column like a static SDO_GEOMETRY column be made hidden. I ask, because unfortunately, SDO_GEOMETRY columns can't be made invisible, which would have been ideal for my use case: Support invisible SDO_GEOMETRY columns (to hide column from application). I'm wondering if a hidden column might work instead.