Odoo is the world's easiest all-in-one management software. It includes hundreds of business apps:
CRM | e-Commerce | Accounting | Inventory | PoS | Project management | MRP | etc.
I've never tried but i think it's not possible to do it directly from odoo studio. You'll need to update your field in python to add the attribute compute and declare your compute function
When you add a field via Odoo studio, it creates a xml file and put records in ir.model.fields that creates the field in postgresql