About This Architecture

Fourth Normal Form (4NF) entity-relationship diagram for a software company database separating multi-valued dependencies into distinct junction tables. EMPLOYEE, EMPLOYEE_SKILL, PROJECT, and EMPLOYEE_PROJECT tables model employees, their programming skills and languages, assigned projects, and project-employee relationships with proper primary and foreign keys. This normalized design eliminates data anomalies and redundancy while maintaining referential integrity across one-to-many and many-to-many relationships. Fork this diagram on Diagrams.so to customize table structures, add additional attributes, or export as .drawio or .png for documentation. The separation of Skill and ProgrammingLanguage into EMPLOYEE_SKILL demonstrates 4NF compliance by isolating independent multi-valued facts.

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How do you design a normalized database schema that separates multi-valued dependencies for employees, skills, and projects?

This 4NF ER diagram shows how to normalize a software company database by separating independent multi-valued facts into distinct tables: EMPLOYEE_SKILL isolates Skill and ProgrammingLanguage attributes, while EMPLOYEE_PROJECT creates a junction table for many-to-many employee-project assignments. Using primary keys (EmployeeID, ProjectID) and foreign keys ensures referential integrity and elimina