# Design a distributed users table that uses UUID for the primary key instead of auto-incrementing int

Canonical URL: <https://datadriven.io/problems/design-a-distributed-users-table-that-uses-uuid-for-the-prim-46b462c2>

Domain: Data Modeling · Difficulty: medium

## Problem

Design a distributed users table that uses UUID for the primary key instead of auto-incrementing integers. UUIDs allow multiple servers to generate unique IDs without coordination.

## Related

- [All practice problems](https://datadriven.io/problems)
- [Mock interview mode](https://datadriven.io/interview/design-a-distributed-users-table-that-uses-uuid-for-the-prim-46b462c2)
- [Data Modeling Interview Questions](https://datadriven.io/data-modeling-interview-questions)
- [Data Engineering Interview Prep Guide](https://datadriven.io/data-engineer-interview-prep)
- [Daily Challenge](https://datadriven.io/daily)

---

Source: DataDriven (https://datadriven.io). 100% free data engineering interview prep. Live code execution against Postgres 16, Python 3.11, and Spark sandboxes. No paywall, no premium tier, no signup gate.