Have you ever wondered how apps like university portals know which courses a student is enrolled in,...
Database relationships use primary and foreign keys to organize data into one-to-one, one-to-many, and many-to-many patterns, eliminating duplication. SQL joins retrieve connected data across tables, fundamental for architecting scalable, efficient database designs.
Have you ever wondered how apps like university portals know which courses a student is enrolled in, or how they pull up an instructor's full schedule in seconds?
The answer lies in database relationships - one of the most important concepts in backend development.
In this article, we'll explore:
What database relationships are and why they matter
The three types of relationships: One-to-One, One-to-Many, and Many-to-Many
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