The reason is pretty simple: a database is a place to store and retrieve data. Creation of data is not up to the database. The database stores data and you ask it to present a relational view of the data stored based upon certain parameters. Regardless of how you relate the tables in your sql statement, you will get a finite amount of data back. Just for a wonderful nightmare, imagine a select statement that recursively inserted into the same table that it was selecting from. Of course, the fact that the database will return a finite amount of data is somewhat nice in my opinion.

Hope this helps. If I made no sense, it's because I've been up for more than 24 hours :-/

antirice    
The first rule of Perl club is - use Perl
The ith rule of Perl club is - follow rule i - 1 for i > 1