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목록HackerRank (32)
오늘도 배운다

문제 Query the list of CITY names from STATION that do not end with vowels. Your result cannot contain duplicates. Input Format The STATION table is described as follows: 제출답안(MySQL) SELECT DISTINCT(city) FROM station WHERE city REGEXP '[^aeiou]$' 풀이(MySQL) 더보기 MySQL 정규표현식 참고자료 문제 바로가기(MySQL)

문제 Query the list of CITY names from STATION that do not start with vowels. Your result cannot contain duplicates. Input Format The STATION table is described as follows: 제출답안(MySQL) SELECT DISTINCT(city) FROM station WHERE city REGEXP '^[^aeiou]' 풀이(MySQL) 더보기 MySQL 정규표현식 참고자료 문제 바로가기(MySQL)

문제 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. Input Format The STATION table is described as follows: 제출답안(MySQL) SELECT DISTINCT(city) FROM station WHERE city REGEXP '^[aeiou].*[aeiou]$' 문제 바로가기(MySQL)

문제 Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. Your result cannot contain duplicates. Input FormatThe STATION table is described as follows: 제출답안(MySQL) SELECT DISTINCT(city) FROM station WHERE city REGEXP 'a$|e$|i$|o$|u$' SELECT DISTINCT(city) FROM station WHERE city REGEXP 'a$|e$|i$|o$|u$' 풀이(MySQL) 더보기 MySQL 정규표현식 사용 참고자료 - https://www.geeksforgeeks.org/mysql..

문제 Query the list of CITY names starting with vowels (i.e., a, e, i, o, or u) from STATION. Your result cannot contain duplicates. Input FormatThe STATION table is described as follows: 제출답안(MySQL) SELECT DISTINCT(city) FROM station WHERE city REGEXP '^a|^e|^i|^o|^u' 풀이(MySQL) 더보기 MySQL 정규식 적용 참고자료 - https://www.geeksforgeeks.org/mysql-regular-expressions-regexp/ 개선답안(MySQL) SELECT DISTINCT(city..

문제 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 that comes first when ordered alphabetically.The STATION table is described as follows: 제출답안(MySQL) (SELECT city, LENGTH(city) FROM station ORDER BY 2 DESC, 1 LIMIT 1) UNION (S..

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: 제출답안(MySQL) SELECT COUNT(city) - COUNT(DISTINCT(city)) FROM station 문제 바로가기(MySQL)

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 described as follows: 제출답안(MySQL) SELECT DISTINCT(city) FROM station WHERE id%2 = 0 문제 바로가기(MySQL)