Milky's note

https://www.hackerrank.com/challenges/weather-observation-station-20/problem?isFullScreen=true&h_r=next-challenge&h_v=zen Weather Observation Station 20 | HackerRank Query the median of Northern Latitudes in STATION and round to 4 decimal places. www.hackerrank.com [문제] A median is defined as a number separating the higher half of a data set from the lower half. Query the median of the Northern ..

https://www.hackerrank.com/challenges/weather-observation-station-5/problem?isFullScreen=true Weather Observation Station 5 | HackerRank Write a query to print the shortest and longest length city name along with the length of the city names. www.hackerrank.com [문제] Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e.: number of char..

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..

https://www.hackerrank.com/challenges/weather-observation-station-3/problem?isFullScreen=true Weather Observation Station 3 | HackerRank Query a list of unique CITY names with even ID numbers. www.hackerrank.com [문제] Query a list of CITY names from STATION for cities that have an even ID number. Print the results in any order, but exclude duplicates from the answer. The STATION table is describe..