>Any hints or especially tutorials would be greatly appreciated
You can purchase REALbasic Standard and pgSQL4RB "internal
deployment" for about $200 total. (Might be a bit more with the weak
dollar.)
With that you can make virtually any stand-alone or console
application you like. The big advantage of pgSQL4RB is that it comes
with excellent documentation and it supports virtually all PostgreSQL
features.
Eduphant is a small but free frontend that was made with RB +
pgSQL4RB. It's a good frontend to learn SQL. You can insert data
using SQL queries and there are templates to show you how.
Go to aliacta.com for more info.
Cheers,
Marc