SQL Practice

Real-life business problems on real tables. Read the scenario, write the query, and get it checked instantly.

All topics SELECT & Filtering Sorting & Limits Aggregation Joins String & Date Functions Window Functions Subqueries NULL & CASE CTEs & Recursion Set Operators Analytics Patterns

All levels Basic Intermediate Expert

Basket pairs: what sells together

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Upgraded, regretted, downgraded

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Hub detection with a self join

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Out and back within a week: round-trip travellers

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Listeners on a three-month growth run

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