# A course-grades table has a composite key, but course name depends on only the course portion

Canonical URL: <https://datadriven.io/problems/a-course-grades-table-has-a-composite-key-but-course-name-d-75fa783d>

Domain: Data Modeling · Difficulty: medium

## Problem

A course-grades table has a composite key, but course name depends on only the course portion. Fix the partial dependency.

## Related

- [All practice problems](https://datadriven.io/problems)
- [Mock interview mode](https://datadriven.io/interview/a-course-grades-table-has-a-composite-key-but-course-name-d-75fa783d)
- [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.