Crack your SQL interview with real‑world practice

Short lessons, then 308 interview-style questions on messy business data. Get one wrong and you see which rows are off, with a nudge on where to look.

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What is the total revenue from Mumbai? This query looks right. Run it, then fix it.

See the orders table (6 rows)

order_id	customer	city	amount	status
101	Asha	Mumbai	1200	completed
102	Ravi	Mumbai	800	cancelled
103	Asha	Mumbai	500	completed
104	Neha	Delhi	900	completed
105	Kabir	Mumbai	300	completed
106	Ravi	Pune	700	completed

SELECT SUM(amount) AS revenue
FROM orders
WHERE city = 'Mumbai';

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Lessons

308

Practice questions

SQL dialects

Why learners use ChaturIQ

Real, messy data

35 tables from 6 industries and a real retailer, with the duplicates and NULLs interviewers test.

Shown where you went wrong

See the rows you missed or added, a nudge on common mistakes, and the classic traps explained. Write it your way; your method is recognised.

Start at your level

Know the basics? A 6-minute quiz opens the levels you already know. Everything is free.

Your next interview has a SQL round. Be ready.

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Built by Mohit Khandelwal, 5+ years in analytics, who learned SQL from YouTube and couldn't find interview-level practice. Read the story