Why Content Path cannot be used to sort a view? Using Views with Drupal 7, how can I use the content path to sort a result table?

I have node title, created date and path as fields for a view.
The first two fields have the checkbox to make them sorting options in the display settings, but the node path field doesn't.
Node path is not a field from DB table. It is calculated dynamically.

In views you can only sort if a sorting can be applied to the underlying SQL query.