Multi-branch fuel station management system ERD with role-based user access, branch operations, pump inventory, and transaction tracking. The schema connects ROLE, USER, BRANCH, FUEL_PUMP, FUEL_TYPE, INVENTORY, and SALE tables using primary and foreign keys to enforce referential integrity across locations. This normalized design supports real-time fuel inventory tracking, sales reporting, and user permission management across distributed fuel stations. Fork and customize this ERD on Diagrams.so to adapt it for your AWS RDS PostgreSQL or MySQL deployment, or export as .drawio to integrate into your database design documentation.