Learn · Practice · Interview
★ 4.9/5 from 1,200+ aspiring data engineersLearn core concepts, then solve SQL, Python, PySpark, Pandas, and DSA interview drills directly in your browser. No installation. No cloud setup. No cluster costs.
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Studio · SQL interview drill
Paid orders in the August window
Filter orders to paid rows in August 2026
SELECT order_id, user_id, order_total,
CAST(created_at AS DATE) AS order_date
FROM orders
WHERE order_status = 'paid'
AND CAST(created_at AS DATE)
BETWEEN DATE '2026-08-01' AND DATE '2026-08-31'
ORDER BY order_id;How Lakebench works
Learn the concept, then practice interview drills on the same warehouse tables. When you want a timer, mock interview rounds are one click away.
LearnEleven tracks, core foundations freeLessons with runnable samples and checked exercises.Open
ProblemsSQL, Python, PySpark interview drillsOriginal interview problems plus the Lakebench SQL study set, all in one studio.Open
InterviewTimed mock roundsPick a round, solve under a clock, then review how ready you look.OpenPricing
One simple monthly pass. No auto-renewal, nothing to cancel.
Pro is activated on your account after payment is confirmed on WhatsApp. Full plan comparison
Ready when you are
Crack a free interview problem in your tab tonight. Keep the first lessons free. Upgrade later if you want the full set of modules, harder drills, and a higher AI quota.
What you get
A loop that feels like prep
Prefer a path first? Browse learn tracks