Language/SQL

Weather Observation Station 12 | HackerRank Query an alphabetically ordered list of CITY names not starting and ending with vowels. www.hackerrank.com Problem Query the list of CITY names from STATION that do not start with vowels and do not end with vowels. Your result cannot contain duplicates. -> 도시 이름의 시작과 끝이 모음이 포함하지 않는 도시의 이름을 중복 없이 출력하시오. Answer select distinct(city) from station where ci..

Weather Observation Station 10 | HackerRank Query a list of CITY names not ending in vowels. www.hackerrank.com Problem Query the list of CITY names from STATION that do not end with vowels. Your result cannot contain duplicates. -> 모음으로 끝나지 않는 도시 이름을 중복 없이 출력하시오. Answer select distinct(city) from station where city regexp "[^aeiou]$"

Weather Observation Station 9 | HackerRank Query an alphabetically ordered list of CITY names not starting with vowels. www.hackerrank.com Problem Query the list of CITY names from STATION that do not start with vowels. Your result cannot contain duplicates. -> 모음으로 시작하지 않는 도시 이름을 중복 없이 출력하시오. Answer select distinct(city) from station where city regexp "^[^aeiou]"

Weather Observation Station 8 | HackerRank Query CITY names that start AND end with vowels. www.hackerrank.com Problem Query the list of CITY names from STATION which have vowels (i.e., a, e, i, o, and u) as both their first and last characters. Your result cannot contain duplicates. -> station에서 처음과 마지막 문자로 모두 모음이 있는 CITY 이름 목록을 중복 없이 출력하시오. Answer select distinct(city) from station where city ..

Weather Observation Station 7 | HackerRank Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. www.hackerrank.com Problem Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. Your result cannot contain duplicates. -> station에서 모음(a, e, i, o, u)으로 끝나는 CITY 이름을 중복 없이 출력하시오. Answer select distinct(city) from station where city regexp "[aeiou]$"

Weather Observation Station 6 | HackerRank Query a list of CITY names beginning with vowels (a, e, i, o, u). www.hackerrank.com Problem Query the list of CITY names starting with vowels (i.e., a, e, i, o, or u) from STATION. Your result cannot contain duplicates. -> station에서 모음(예: a, e, i, o, u)으로 시작하는 city를 중복 없이 출력하시오. Answer select distinct(city) from station where city regexp "^[aeiou]" -- ..

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 Problem Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e.: number of characters in the name). If there is more than one smallest or largest city, choose the one tha..

Weather Observation Station 4 | HackerRank Find the number of duplicate CITY names in STATION. www.hackerrank.com Problem Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. -> station에 있는 모든 city의 수와 중복을 제외한 city의 수의 차이를 구하시오. Answer select count(city) - count(distinct(city)) from station