A web-based tool for database modeling that facilitates the creation of entity relationship diagrams, relational schemas, star schemas, and SQL DDL statements is ERDPlus. This intuitive platform enables users to generate Entity Relationship Diagrams (ERDs) swiftly and effortlessly. It is compatible with various modern relational database management systems such as Oracle, MySQL, Microsoft SQL Server, PostgreSQL, Teradata, IBM DB2, Microsoft Access, and many others. The tool's notation allows for the representation of regular and weak entities, accommodating different attribute types, including unique, multi-valued, derived, composite, and optional attributes, as well as all cardinality constraints for relationships, which include mandatory and optional associations. Furthermore, ERDPlus streamlines the creation of foreign keys and referential integrity lines through user-friendly click-and-connect actions, making it easier to develop relational schemas. Additionally, the notation enhances clarity by differentiating fact tables from dimension tables, employing a thicker frame around fact tables, which aids users in visualizing their database structures effectively. Overall, ERDPlus stands out as a valuable asset for database designers seeking efficiency and precision.