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목록Count (2)
Milky's note
[HackerRank](E) Revising Aggregations - The Count Function
https://www.hackerrank.com/challenges/revising-aggregations-the-count-function/problem?isFullScreen=true Revising Aggregations - The Count Function | HackerRank Query the number of cities having populations larger than 100000. www.hackerrank.com [문제] Query a count of the number of cities in CITY having a Population larger than 100,000. Input Format The CITY table is described as follows: [답] -my..
[HackerRank](E) Weather Observation Station 4
https://www.hackerrank.com/challenges/weather-observation-station-4/problem?isFullScreen=true Weather Observation Station 4 | HackerRank Find the number of duplicate CITY names in STATION. www.hackerrank.com [문제] 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..