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

Black Friday month: the 7-day rolling average

CTEs & Recursion

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Span of control: who really runs the org?

CTEs & Recursion

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Quarter by quarter: how fast is Nordvik growing?

CTEs & Recursion

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Lahore to New York with at most two stops

CTEs & Recursion

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Filling the empty days: May 2026 daily plays

CTEs & Recursion

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New versus returning listeners, month by month

CTEs & Recursion

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