Database design is one of the most critical skills for any web developer. A well-designed database ensures application performance, data integrity, and scalability — while a poorly designed one causes headaches for years.
Normalization
Database normalization is the process of organizing a relational database to reduce redundancy and improve data integrity. The normal forms (1NF, 2NF, 3NF, BCNF) provide a systematic way to structure tables.
Indexing Strategy
Indexes dramatically speed up SELECT queries but slow down INSERT/UPDATE/DELETE operations. Index columns that appear in WHERE clauses, JOIN conditions, and ORDER BY statements. Avoid over-indexing.
Foreign Keys and Constraints
Always define foreign key constraints to maintain referential integrity. Use ON DELETE CASCADE or ON DELETE SET NULL depending on your business logic. These constraints prevent orphaned records.
Comments (1)
Database indexing is often overlooked. Good reminder!