Design database schemas with normalization, relationships, and constraints. Use when creating new database schemas, designing tables, or planning data models for PostgreSQL and MySQL.

Database Schema Design Table of Contents [Overview]( overview) [When to Use]( when to use) [Quick Start]( quick start) [Reference Guides]( reference guides) [Best Practices]( best practices) Overview Design scalable, normalized database schemas with proper relationships, constraints, and data types. Includes normalization techniques, relationship patterns, and constraint strategies. When to Use New database schema design Data model planning Table structure definition Relationship design (1:1, 1:N, N:N) Normalization analysis Constraint and trigger planning Performance optimization at schema level Quick Start PostgreSQL Eliminate Repeating Groups: Reference Guides Detailed implementations in the references/ directory: Guide Contents [First Normal Form (1NF)](references/first normal form 1nf.md) First Normal Form (1NF) [Second Normal Form (2NF)](references/second normal form 2nf.md) Second Normal Form (2NF) [Third Normal Form (3NF)](references/third normal form 3nf.md) Third Normal Form (3NF) [Entity Relationship Patterns](references/entity relationship patterns.md) Entity Relationship Patterns Best Practices ✅ DO Follow established patterns and conventions Write clean, maintainable code Add appropriate documentation Test thoroughly before deploying ❌ DON'T Skip testing or validation Ignore error handling Hard code configuration values

database-schema-design