How to Pick a Free Dataset Worth Practising On, Not Just Find One

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Data analyst Michael Nocito published a practical guide on DEV Community on August 8, 2026, aimed at helping analysts choose useful free datasets rather than simply locating them. He argues that finding data is easy, but deciding whether a dataset can actually teach you something is the step most guides skip. Nocito recommends a quick five-minute check: confirm the dataset contains a date column, a category column, and a numeric column, as most analytical techniques require all three. He identifies government open data portals such as data.gov as the best source for realistic, uncleaned data, while Kaggle is highlighted for its searchability. Datasets are further rated by having thousands of rows and at least one joinable table, skills he considers essential for moving beyond basic spreadsheet work.

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