You can edit data in existing tables, but there is not yet a "Create Table" action. In fact, Ultorg does not currently host any data at all; it is all assumed to be existing in an external data source.

So for now I'd recommend doing the actual CREATE TABLE statements manually in e.g. an external PostgreSQL database, but then using Ultorg to edit the data.

Schema editing actions (Create Table, Insert Column etc.) are on the TODO list, though.