@sestell: I did indeed post my question to stackexchange as well, though I did not receive as much help as here. To post on reddit never occurred to me though,...

@mike-2: That's alright, I suppose the internet has made us all a little more cynical.
Ah, I understand, thank you for explaining! Database structures and using them in...

@phil:
Don't worry about it, posting here was a long shot, but let's hope I do get lucky! Thank you for the tips.

@mike-2: Not really...

@phil

I didn't find a proper, active postgresql forum, but if you've got one I'd appreciate a link!

I am working with postgresql.

Example:

Package Table
id  | minfreight | maxfreight
1 |     10    |     150
2 |   null    |    null