HackerRank: Weather Observation Station 3
Question and Answer:

Key Points:
What the Query Does
- Retrieves unique CITY names where the station ID is even
Key Conditions Used
ID % 2 = 0ensures only even IDs are includedDISTINCT CITYremoves duplicate city names
Why It Works
- Meets both requirements:
1️⃣ Even ID filter
2️⃣ No duplicate city results
Output
- List of unique city names matching the condition