Focused practice · SQL Pro

Prepare for SQL interviews with hands-on exercises

Three series of ten challenges to measure pace, score and skills to revisit, without attributing questions to real companies.

challenges30Easy · Medium · Hard
series310 × 3
Optional timer (minutes)45skill report

Choose a series that matches your current level.

Start with direct queries or jump into advanced cases. Each series reuses ten verified catalogue exercises.

Each series is a bank of 10 challenges to work through over several sessions. Advanced cases contain several missions: you are not expected to finish the entire series in 45 minutes.

01Easy45-min session
Recommended starting point

Direct, reliable queries

10 focused challenges

The best starting point to check SELECT, filters and precision.

Skills covered
SELECTWHERE · ORDER BYDISTINCT · LIMIT
Try one challengeFull series included with SQL Pro
02Medium45-min session

Analysis under pressure

10 focused challenges

Combine several concepts while keeping a clear method against the clock.

Skills covered
INNER JOINCTE · CASEDates · GROUP BY
Try one challengeFull series included with SQL Pro
03Hard45-min session

Complex cases to defend

10 focused challenges

Solve multi-step analyses and verify the reliability of your result.

Skills covered
level of detail · joins · AggregationsCohorts · Retention · DatesRFM · Segmentation · CASE
Try one challengeFull series included with SQL Pro

Practice access

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Create an account with no bank card to open all three series for 30 days.

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These challenges are created by SQL.tn from fictional situations. They are not presented as questions from well-known companies.