| Challenge | Problem | Difficulty | Solution |
|---|---|---|---|
| Revising the Select Query 1 | Problem | Easy | Solution |
| Revising the Select Query 2 | Problem | Easy | Solution |
| Select By Id | Problem | Easy | Solution |
| Japanese Cities Attributes | Problem | Easy | Solution |
| Japanese Cities Name | Problem | Easy | Solution |
| Weather Observation Station 1 | Problem | Easy | Solution |
| Weather Observation Station 2 | Problem | Easy | Solution |
| Weather Observation Station 3 | Problem | Easy | Solution |
| Weather Observation Station 4 | Problem | Easy | Solution |
| Weather Observation Station 5 | Problem | Easy | Solution |
| Weather Observation Station 6 | Problem | Easy | Solution |
| Weather Observation Station 7 | Problem | Easy | Solution |
| Weather Observation Station 8 | Problem | Easy | Solution |
| Weather Observation Station 9 | Problem | Easy | Solution |
| Weather Observation Station 10 | Problem | Easy | Solution |
| Weather Observation Station 11 | Problem | Easy | Solution |
| Weather Observation Station 12 | Problem | Easy | Solution |
| More Than 75 Marks | Problem | Easy | Solution |
| Name Of Employees | Problem | Easy | Solution |
| Average Population | Problem | Easy | Solution |
| Average Population of Each Continent | Problem | Easy | Solution |
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