Database Modeling Fundamentals

Database modeling is one of the decisions that defines the long-term health of an application. Bad modeling may go unnoticed on day one, but every feature gets more expensive as the product grows.

Separate the Concepts First

For a blog, basic entities like users, posts, and comments may be obvious. The real question is which fields they have and how they relate to each other.

create table posts (
  id uuid primary key,
  author_id uuid not null,
  title text not null,
  slug text not null unique,
  created_at timestamptz not null
);

Think About Indexes Based on Usage

Adding an index on every column is not the answer. Prioritize fields that are frequently filtered, sorted, or used in joins.

Conclusion

A good data model simplifies the application code. When the data relationships are set up properly, the business rules stay less scattered.