SQL Sales Database Design & Evolution

📌 Project Overview

This repository demonstrates a complete workflow for designing and evolving a relational database. It moves beyond basic table creation to show how a database schema can be modified and improved over time to meet changing business requirements.

🛠️ Advanced DDL Skills Demonstrated

• Schema Architecture: Designing normalized tables with strict data types for a Retail Sales ecosystem.
• Database Evolution (ALTER): Utilizing ALTER TABLE statements to modify existing structures, add columns, and refine constraints without data loss.
• Data Integrity & Defaults: * Implementing Default Constraints to ensure consistent data entry.
  • Enforcing Primary & Foreign Keys for robust relational mapping.
  • Applying NOT NULL and UNIQUE constraints to maintain high data quality.

Related Projects

• 🔗 SQL Employee Database Analysis
  https://github.com/nonyeobi-stack/SQL-Employee-Database-Analysis