Once these are clear and BPM is confirmed, relational data model scope gets identified by visiting Entity relationship diagram along with Business and Functional data models of the project.

This repository contains the database schema, ER diagram, relational model, and SQL queries for managing an online retail store. The database consists of 10 tables: admin, cart, category, coupons, ...

This probably depends on how closely you are trying to represent relational table structures. If your diagram is a logical model which is not meant to imply a relational implementation, then it is ...