ER Diagram Tool

ER Diagram tool provides a domain-focused environment to model relational databases through entities, attributes, and relationships. It targets data architects, DB designers, developers, and analysts who need clear visual representations of relational structures. Example: model a simple e-commerce schema with Customer, Order, Product, and Payment, illustrating one-to-many relations and keys.
Core logic supports entities with primary keys, attributes, and foreign keys; define relationships with cardinalities; and apply optional constraints. Advanced users can model subtypes, weak entities, derived attributes, and generate SQL for schema creation. The tool emphasizes consistency, reusable templates, and straightforward exports to documentation assets.
Use cases include design reviews, onboarding new team members, and documenting data models for stakeholders. It enables rapid iteration, ensures that relationships reference valid entities, and produces a clean, export-ready diagram that aligns with standard relational notation.