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Many questions on Hackerrank are be written properly. Sucks trying to practice for job interview if questions don't make sense.
Here's how I solved this using MySQL: SELECT COUNT(city) - COUNT(distinct city) from STATION
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Weather Observation Station 4
You are viewing a single comment's thread. Return to all comments →
Many questions on Hackerrank are be written properly. Sucks trying to practice for job interview if questions don't make sense.
Here's how I solved this using MySQL: SELECT COUNT(city) - COUNT(distinct city) from STATION