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  1. Practice
  2. SQL
  3. Basic Select
  4. Weather Observation Station 4
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Weather Observation Station 4

  • marinskiy
     + 2 comments

    Here is Oracle solution from my HackerrankPractice repository:

    SELECT COUNT(CITY) - COUNT(DISTINCT CITY)
FROM STATION;

    Feel free to ask if you have any questions :)