You create structured data models for things like countries, states, cities, tax types. You also write seed scripts (using Prisma ORM) to populate those tables with sample/master data.

Data Relationships
You carefully manage how entities are linked:

Cities belong to States and Countries

States belong to Countries

You build queries that fetch related data (like showing a city’s state and country in detail pages).

Business Rules Implementation
You add logic to check if records already exist before inserting, ensure case-insensitive lookups when needed, and maintain referential integrity