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문제풀이/HackerRank

Weather Observation Station 4

by 제밍 2022. 11. 2.

Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table.
The STATION table is described as follows:

where LAT_N is the northern latitude and LONG_W is the western longitude.

 

 

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

 

 

Weather Observation Station 4 | HackerRank

 

Weather Observation Station 4 | HackerRank

Find the number of duplicate CITY names in STATION.

www.hackerrank.com

 

 

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