ERD Lab

A database modeling tool for creating entity relationship diagrams, relational schemas, star schemas, and SQL DDL statements. ERDPlus is a web-based database modeling tool that lets you quickly and easily create Entity Relationship Diagrams (ERDs). Works with most contemporary RDBMS tools including Oracle, MySQL, Microsoft SQL Server, PostgreSQL, Teradata, IBM DB2, Microsoft Access, and others. The notation supports drawing regular and weak entities, various types of attributes (regular, unique, multi-valued, derived, composite, and optional), and all possible cardinality constraints of relationships (mandatory-many, optional-many, mandatory-one, and optional-one). The tool supports the quick creation of foreign keys and referential integrity lines by simple click-point-connect actions. This simplifies and quickens the process of creating relational schemas. The notation distinguishes fact tables from dimension tables by using a thicker frame around fact tables.

Galaxy Modeler is a schema design tool for GraphQL data modeling. Draw diagrams, add notes, captions to the diagrams, import existing schema structures and generate reports or schema creation scripts. Supported platforms: - GraphQL Key features: - Data modeling and schema design - Visualization of GraphQL schemas - Import from URL - Generation of interactive HTML reports - Generation of schema creation scripts - Various themes and styles for reports - Multiple display modes - Support for sub-diagrams