Practice problems across 75+ categories
Practice problems frequently asked at Database • 324 problems | 120 Easy | 135 Medium | 61 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 61 | Countries You Can Safely Invest In | Medium | Database |
| 62 | Create a New Column | Easy | Database |
| 63 | Create a Session Bar Chart | Easy | Database |
| 64 | Customer Order Frequency | Easy | Database |
| 65 | Customer Placing the Largest Number of Orders | Easy | Database |
| 66 | Customer Purchasing Behavior Analysis | Medium | Database |
| 67 | Customer Who Visited but Did Not Make Any Transactions | Easy | Database |
| 68 | Customers Who Bought All Products | Medium | Database |
| 69 | Customers Who Bought Products A and B but Not C | Medium | Database |
| 70 | Customers Who Never Order | Easy | Database |
| 71 | Customers with Maximum Number of Transactions on Consecutive Days | Hard | Database |
| 72 | Customers With Strictly Increasing Purchases | Hard | Database |
| 73 | Daily Leads and Partners | Easy | Database |
| 74 | Deep Object Filter | Medium | Database |
| 75 | Delay the Resolution of Each Promise | Medium | Database |
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