Master SQL.
Advance Your Career.
Learn practical SQL skills with real-world scenarios that employers are actually looking for. All for a one-time fee of $9.99, not monthly subscriptions.
Too theoretical, not enough real practice
Hands-on with real-world data
Generic examples that don't reflect actual jobs
Industry-specific scenarios
No feedback on your query approaches
Instant feedback on all solutions
Nothing to show employers after learning
Shareable portfolio of your work
Active Learners
Practice Questions
Industry Datamarts
User Rating
SQL is Your Gateway to Data Career Opportunities
Master SQL and unlock these high-paying roles in the data industry. Companies are actively seeking professionals with strong SQL skills.
Data Analyst
Business Intelligence Analyst
Database Administrator
Data Engineer
Data Scientist
Your Complete SQL Learning Platform
Join 100+ SQL professionals who have accelerated their careers with our comprehensive learning tools
40+ Practice Questions
From basic to advanced SQL across multiple database types
7+ Real-World Datamarts
Practice with e-commerce, healthcare, finance, and more
Learning Resources
Comprehensive guides and tutorials to build your SQL knowledge
Portfolio Creator
Build a shareable showcase of your SQL skills for employers
40+ SQL Practice Questions
For Real-World Scenarios
Our carefully crafted practice questions cover everything from basic joins to advanced window functions, spanning multiple industries and real-world data challenges.
Master the fundamentals before tackling advanced concepts
Verified Solutions
Multiple solution approaches with performance insights
Multiple Approaches
Learn different techniques to solve the same problem
Progress Tracking
Track your improvement across different SQL concepts
Concept Explanations
Learn the theory behind each SQL technique
Difficulty Distribution
Topics Covered
FROM employees e
JOIN departments d
ON e.dept_id = d.id
COUNT(stream_id) as streams
FROM musicfy.streams
GROUP BY artist_name
7 Complete Datamarts to
Hone Your SQL Skills
Connect to industry-specific database structures that mirror what you'll encounter in real jobs. From music streaming to healthcare, box office to video games, build skills that employers actually need.
Practice with database models used by real tech companies
Realistic Table Relationships
Handle complex many-to-many and hierarchical data models
Diverse Data Examples
From Spotify-like music data to healthcare claims analysis
Instant Query Validation
Get immediate feedback on your SQL approach and efficiency
Data Exploration Tools
Interactive schema browsers and data dictionaries
Stand Out to Employers
With Your SQL Portfolio
Our SQL Portfolio Creator transforms your practice work into an impressive showcase of your database skills. Include your best queries, explanations, and visualizations that demonstrate your problem-solving approach.
Showcase your practical skills to stand out from other candidates
Query Annotations
Add detailed explanations that showcase your problem-solving approach
Skill Certification
Showcase your verified completion of our practice questions
LinkedIn Integration
Add a direct link to your professional profile for recruiters
GitHub Connection
Link to your GitHub repositories to showcase related projects
✨Customer Re-engagement Strategy
This query identifies high-value customers who haven't purchased in the last 90 days - perfect candidates for a targeted re-engagement campaign with personalized incentives.
-- Finding high-value customers who haven't purchased recently SELECT c.customer_id, c.email, c.first_name, c.last_name, SUM(o.total_amount) AS lifetime_value, COUNT(o.order_id) AS order_count, MAX(o.order_date) AS last_order_date, DATEDIFF(CURRENT_DATE, MAX(o.order_date)) AS days_since_last_order FROM customers c JOIN orders o ON c.customer_id = o.customer_id GROUP BY c.customer_id, c.email, c.first_name, c.last_name HAVING SUM(o.total_amount) > 500 AND DATEDIFF(CURRENT_DATE, MAX(o.order_date)) > 90 ORDER BY lifetime_value DESC LIMIT 50;
SQL Practice Achievements
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