Concept of Keys in DBMS - Super, Primary, Candidate, Foreign Key, etc

Part 3.5 #ClosureSetofAttributes #HowtoFindClosureSetofAttributes #AttributeClosureAlgorithm

Databases: Enhanced ERD - Supertypes and Subtypes

Entity Relationship Diagram (ERD) Tutorial - Part 2

ER diagram for online store using Crow's foot (attributes & cardinalities)