# Build a user profile schema with flat core data for fast queries and nested supplementary data for f

Canonical URL: <https://datadriven.io/problems/build-a-user-profile-schema-with-flat-core-data-for-fast-que-3b1d6918>

Domain: Data Modeling · Difficulty: medium

## Problem

Build a user profile schema with flat core data for fast queries and nested supplementary data for flexible attributes.

## Related

- [All practice problems](https://datadriven.io/problems)
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- [Data Engineering Interview Prep Guide](https://datadriven.io/data-engineer-interview-prep)
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