Relational Database Concepts — a practical guide to relational database concepts with clear examples you can reuse in real projects.
SQL Tutorial Series (5/100). Prefer one article? Read the complete SQL tutorial.
Short description
Relational databases store data in tables related by keys — enabling powerful joins and constraints.
Relational ideas
Relation ≈ table
Tuple ≈ row
Attribute ≈ column
Keys relate tables