A hierarchical is specialized in managing data which is hierarchically structured, while a relational database is not. Maybe this analogy is clearer: If you want to fly you could attach wings to your sportscar, but it's more logical to use a plane.
>>> Dmitry Turin <[EMAIL PROTECTED]> 2007-04-20 16:21 >>> >you could use a hierarchical database instead of a relational database why ? why is impossible to make addition for relational database?
