Put your SQL knowledge into practice with questions on joins, aggregation, subqueries, and window functions. Learn to write accurate queries and explain your approach in technical interviews.
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| Problem | Topics | Resources | |
|---|---|---|---|
1. Email Duplicates | Aggregation & Grouping | ||
2. Match Employees With Their Salaries | Joins & Relationships | ||
3. Top Grade per Student | Window Functions | ||
4. Warmer Days | Joins & Relationships | ||
5. Big Countries | Filtering & Sorting | ||
6. Combine Active and Archived Users | Set Operations & Merging | ||
7. Query Quality Analysis | Aggregation & Grouping | ||
8. All-Product Buyers | Subqueries & Set Logic | ||
9. Highest Order Placing Customer | Aggregation & Grouping | ||
10. Employees Earning More Than Their Manager | Joins & Relationships |