Hello to you all this is my first message here.
I need to build up a database about recipes, ingredients, purchasing and selling orders and I'm a bit confused.
I have tried to think to a functional structure, but I am sure it will not work, especially relations-wise.
I hope the attached file will help understanding the structure, I'm sure for you it will very easy to spot the mistake.
Thanks to those providing any help.
Relazioni per gestione.pdf