4 docs tagged with "database-design"

Understand the advanced types of database keys. Learn about Composite Keys, Alternate Keys, and Super Keys with real-world examples.

Master the most important SQL constraints: Primary Keys and Foreign Keys. Learn how to uniquely identify rows and link tables together safely.

Your central resource for learning SQL and database management. Master universal concepts and explore dialect-specific features for Oracle, MySQL.

Learn how to enforce data integrity using SQL constraints. In-depth guide to NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, and CHECK constraints.