Hi,
Activate the developer mode and navigate to Settings -> Technical -> Database Structure -> Models and search and open your model, ie, res.company, then if you open it you can see the details regarding the model like field, access rights, record rules etc.

Non stored computed fields and related fields will not be there in the database table even though they show it in above screen.

Also you have option to connect odoo database frpm pg admin, for this see: Install PgAdmin Configure With Odoo Access, Visualize and Update Data

Thanks

Thanks Niyas.
(can't reply on your comment since I am a new member)