DevHyun

www.hackerrank.com/domains/sql Amber's conglomerate corporation just acquired some new companies. Each of the companies follows this hierarchy: Given the table schemas below, write a query to print the company_code, founder name, total number of lead managers, total number of senior managers, total number of managers, and total number of employees. Order your output by ascending company_code. No..

www.hackerrank.com/domains/sql 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: where LAT_N is the northern latitude and LONG_W is the western longitude. 짧은 영어실력으로 번역하자면.. STATION 테이블의 CITY 필드를 추출해 내는 것이 목표이고, 조건은 ID가 EVEN(짝수) 일 것. 정렬 순서는 상관없고 중복제거 MSS..