# Add a date dimension to the sales star schema

Canonical URL: <https://datadriven.io/problems/add-a-date-dimension-to-the-sales-star-schema-the-fact-tabl-a934732e>

Domain: Data Modeling · Difficulty: medium

## Problem

Add a date dimension to the sales star schema. The fact table needs to track when each sale occurred.

## Related

- [All practice problems](https://datadriven.io/problems)
- [Mock interview mode](https://datadriven.io/interview/add-a-date-dimension-to-the-sales-star-schema-the-fact-tabl-a934732e)
- [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.