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• [해커랭크/SQL] 14. Weather Observation Station 9 (REGEXP) 👉 https://www.hackerrank.com/challenges/weather-observation-station-9/problem?isFullScreen=true&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen Weather Observation Station 9 | HackerRank Query an alphabetically ordered list of CITY names not starting with vowels. www.hackerrank.com 🤔 문제 분석 1) Query the list of CITY names from STATION that do not start with vowels. Your result cannot contai.. 코딩테스트/해커랭크 SQL 2023. 2. 20.

• [해커랭크/SQL] 13. Weather Observation Station 8 (REGEXP) 👉 https://www.hackerrank.com/challenges/weather-observation-station-8/problem?isFullScreen=true&h_r=next-challenge&h_v=zen Weather Observation Station 8 | HackerRank Query CITY names that start AND end with vowels. www.hackerrank.com 🤔 문제 분석 1) 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.. 코딩테스트/해커랭크 SQL 2023. 2. 20.

• [해커랭크/SQL] 12. Weather Observation Station 7 👉 https://www.hackerrank.com/challenges/weather-observation-station-7/problem?isFullScreen=true Weather Observation Station 7 | HackerRank Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. www.hackerrank.com 🤔 문제 분석 1) Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. Your result cannot contain duplicates. 💡 풀이 SELECT DISTINCT CITY FROM STA.. 코딩테스트/해커랭크 SQL 2023. 2. 20.

• [TIL] 20230218 (토) 오늘 한 일 토익 뿌시기 총 공부시간 11시간 40분 57초 복습 및 회고/TIL 2023. 2. 18.

• [TIL] 20230217 (금) 오늘 공부한 것 1. 토익 2. 토스 총 공부시간 7시간 24분 51초 복습 및 회고/TIL 2023. 2. 17.

• [TIL] 20230216 (목) 오늘 한 일 1. ETS 8회 RC/LC 풀기 및 오답, 단어정리 2. 문법 3. 단어 25~30 4. 토스 part3 7번 총 공부시간 09시간 11분 16초 복습 및 회고/TIL 2023. 2. 16.

• [TIL] 20230215 (수) 오늘 한 일 1. 코레일 지원서 제출 2. SQL 5문제 풀기 3. ETS 7회 LC/RC 4. 영어 문법 5. 전남도청 통합채용 지원서 제출(통계 시험 보러 가는용) 총 공부시간 09시간 42분 43초 복습 및 회고/TIL 2023. 2. 15.

• [해커랭크/SQL] 11. Weather Observation Station 6 👉 https://www.hackerrank.com/challenges/weather-observation-station-6/problem?isFullScreen=true Weather Observation Station 6 | HackerRank Query a list of CITY names beginning with vowels (a, e, i, o, u). www.hackerrank.com 🤔 문제 분석 1) Query the list of CITY names starting with vowels (i.e., a, e, i, o, or u) from STATION. Your result cannot contain duplicates. 💡 풀이 SELECT CITY FROM STATION WHERE.. 코딩테스트/해커랭크 SQL 2023. 2. 15.

• [해커랭크/SQL] 10. Weather Observation Station 5 👉 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 분석 1) Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e.: number.. 코딩테스트/해커랭크 SQL 2023. 2. 15.

• [해커랭크/SQL] 9. 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 분석 1) Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. 💡 풀이 SELECT COUNT(CITY) - COUNT(DISTINCT CITY) FRO.. 코딩테스트/해커랭크 SQL 2023. 2. 15.

• [해커랭크/SQL] 8. Weather Observation Station 3 👉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 분석 1) Query a list of CITY names from STATION for cities that have an even ID number. 2) Print the results in any order, but exclude duplicates from the answer. 💡 풀이 SELECT DISTINC.. 코딩테스트/해커랭크 SQL 2023. 2. 15.

• [해커랭크/SQL] 7. Japanese Cities' Attributes 👉https://www.hackerrank.com/challenges/japanese-cities-attributes/problem Japanese Cities' Attributes | HackerRank Query the attributes of all the cities in Japan. www.hackerrank.com 🤔 문제 분석 1) Query all attributes of every Japanese city in the CITY table. The COUNTRYCODE for Japan is JPN. 💡 풀이 SELECT * FROM CITY WHERE COUNTRYCODE = "JPN" 코딩테스트/해커랭크 SQL 2023. 2. 15.