This guide helps you practice SQL with real datasets and business questions. Move beyond tutorials and build portfolio projects that show you can solve actual problems. Includes everything you need: dataset links, practice questions by industry, and assessment prep resources.

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SQL Practice Resources for Assessments and Interviews

SQL Practice Resource Guide

1. Healthcare Datasets

These sources are ideal for practicing logic related to patient journeys, clinical outcomes, and insurance billing.

• **Kaggle Healthcare Dataset:** A synthetic dataset containing patient demographics, medical conditions, and billing amounts.
• **HealthData.gov:** A vast repository of U.S. government health data, including Medicare claims and population statistics.
• **CMS Data:** Access to public data from the Centers for Medicare & Medicaid Services, great for payer-style workflows.
• **CDC WONDER:** An inventory of public health data for epidemiologic research and mortality analysis.

2. Nonprofit Datasets

Practice analyzing donor behavior, grant allocation, and operational transparency.

• **GivingTuesday Data Commons:** Offers diverse datasets on generosity, giving trends, and fundraising effectiveness.
• **Nonprofit Open Data Collective:** A comprehensive dataset of IRS Form 990 filings from U.S. nonprofits.
• **Candid (formerly GuideStar):** Provides robust data for researching nonprofits and evaluating foundation grants.
• **Data.gov Nonprofit Research:** Surveys of research and development performance at U.S. 501(c) organizations.