SELECT
Select All Employees
Start with a clear table-reading task and return the complete employee dataset.
Open exerciseBuild practical SQL skill for reporting, dashboards, business metrics, and analytics interviews with 300 hands-on challenges. SQL Master gives you realistic datasets, instant validation, guided solutions, and AI feedback.
Real SQL patterns used in analyst work.
Free practice examples
Move from retrieving rows to grouped reporting and multi-table analysis. Each exercise opens in the live SQL editor with schema and sample data.
SELECT
Start with a clear table-reading task and return the complete employee dataset.
Open exerciseGROUP BY
Build a grouped headcount report—the kind of summary analysts create every day.
Open exerciseJOIN
Combine employee and department data to produce a useful business-facing result.
Open exerciseReal analyst work is not just syntax. You need to understand tables, join paths, metrics, time periods, segments, and how to explain the result. SQL Master is built around those practical query patterns.
Build business reports with filters, summaries, sorting, and calculated metrics.
Combine customer, order, product, employee, and department tables correctly.
Use COUNT, SUM, AVG, MIN, MAX, GROUP BY, and HAVING for business analysis.
Practice rankings, running totals, lag analysis, cohorts, and window functions.
The platform combines practice, checking, explanation, and repetition. That loop is what turns memorized SQL syntax into usable analyst skill.
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The Free plan includes 92 accessible challenges, daily practice runs, progress tracking, and interview practice.
Start with the free SELECT exerciseGo deeper with Pro
Get all 300 challenges across 250 Core and 50 Advanced exercises, plus higher AI review limits and unlimited eligible practice.
Compare Free and ProA data analyst should be comfortable with filtering, joins, aggregation, grouping, dates, text functions, CASE expressions, CTEs, subqueries, window functions, and interpreting business questions as SQL queries.
Yes. SQL Master runs in the browser and includes a safe SQL sandbox, schemas, realistic datasets, instant validation, and guided solutions.
No. SQL Master includes beginner, medium, hard, and expert SQL questions covering basic retrieval, reporting logic, analytics, and interview-level query patterns.
Start with 92 accessible challenges, then unlock all 300 questions and higher AI review limits when you want deeper preparation.