PostgreSQL, compared to SQLite, is a little more difficult to get started with, but for those who have already got over postgres' initial connection gotchas: the SQLite connection string that is used here ("dbi:SQLite:Test.sqlite") can be replaced with a connection string for PostgreSQL, for instance: "dbi:Pg:port=6542;db=testdb", and the three parts in the OP (create table, insert rows, select rows) will run exactly the same on such a postgresql $dbh (data base handle).
PostgreSQL flavour of SQL: sql-commands.html
SQLite remains a toy-database; IMHO one might as well start out with the real thing.
