The request
“An employee skills and certification database with employees, skills, certifications, training courses, employee skills, and employee certifications, including issue and expiry details.”
Then tryAdd a manager approval for certificationsAdd a training session schedule
What is in this drawing
Read the decisions behind it.
01
Modeled certification as an associative entity to capture many-to-many relationship between employee and skill with additional certification details.
02
Used Crowsfoot notation (v0.1) to represent one-to-many relationships from Employee and Skill to Certification.
03
Explicitly defined foreign key references in the Certification table for clarity.
Use this schema when building an HR system that requires tracking which employees are certified in which skills.
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