Database Design

I need an expert to design a robust database tailored to my needs.

Key requirements:
- **Database Type:** Relational, SQL or Data Warehouse
- **Primary Purpose:** Storing customer information, managing inventory, or handling transactions
- **Main Data Types:** Text, numerical, or multimedia

Ideal skills and experience:
- Proficiency in various database systems
- Experience in designing databases for specific purposes
- Strong understanding of data types and structures

Please provide relevant portfolio work and any certifications.