HackerRank MySQL - Weather Observation Station 4




Let N be the number of CITY entries in STATION, and let N^ be the number of distinct CITY names in STATION; query the value of N-N^ from STATION. In other words, find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table.



  1. SELECT COUNT(CITY) - COUNT(DISTINCT CITY)
  2. FROM STATION;
Please click on the like button if it worked

Solution not working or have any suggestions? Please send an email to [email protected]


donate a cup of tea :)


Join Our Facebook Group

Share this solution






codesadda.com

Codesadda.com is your home of programming solutions, tutorials, video tutorials and much more. Sign Up for our weekly newsletter to get update about new content.

Like us on Facebook | Connect with us on LinkedIn | Subscribe our Channel on Youtube