Understanding SQL JOINs and Database Relationships
Master SQL JOINs with this practical guide covering INNER, LEFT, RIGHT, FULL OUTER, and CROSS joins. Learn how relationship types between tables shape your queries.
Posts tagged with #relational-databases
Database Normalization: From 1NF to BCNF
Learn database normalization from 1NF through BCNF. Understand how normalization eliminates redundancy, prevents update anomalies, and when denormalization makes sense for performance.
Primary and Foreign Keys: A Practical Guide
Learn the difference between natural and surrogate keys, how foreign keys enforce referential integrity, cascade rules, and best practices for constraint naming.
Schema Design: Building the Foundation of Your Database
Learn how to design effective database schemas with proper data types, constraints, and relationships that scale with your application.