DB6 [SQL] 해커랭크 HackerRank Interviews 문제 풀이 문제Samantha interviews many candidates from different colleges using coding challenges and contests. Write a query to print the contest_id, hacker_id, name, and the sums of total_submissions, total_accepted_submissions, total_views, and total_unique_views for each contest sorted by contest_id. Exclude the contest from the result if all four sums are .Note: A specific contest can be used to screen.. 2025. 3. 19. [SQL] 해커랭크 HakerRank 문제 풀이 Symmetric Pairs 문제 You are given a table, Functions, containing two columns: X and Y. (그림 확인)Two pairs (X1, Y1) and (X2, Y2) are said to be symmetric pairs if X1 = Y2 and X2 = Y1.Write a query to output all such symmetric pairs in ascending order by the value of X. List the rows such that X1 ≤ Y1. 해석주어진 테이블 **Functions**에는 두 개의 컬럼 **X**와 **Y**가 존재한다.이 테이블에서 **대칭 쌍(Symmetric Pairs)**을 찾아야 한다.두 개의 쌍 (X1, Y1)과 (X2.. 2025. 3. 17. [SQL] 해커랭크 HackerRank Placements 문제 풀이 문제You are given three tables: Students, Friends and Packages. Students contains two columns: ID and Name. Friends contains two columns: ID and Friend_ID (ID of the ONLY best friend). Packages contains two columns: ID and Salary (offered salary in $ thousands per month).Write a query to output the names of those students whose best friends got offered a higher salary than them. Names must be orde.. 2025. 3. 16. [SQL] 해커랭크 HackerRank New Companies 문제 풀이 문제Amber'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.Note:The tables may contain dupli.. 2025. 3. 15. [SQL] 해커랭크 HackerRank 문제 풀이 Employee Salaries 문제 Employee SalariesWrite a query that prints a list of employee names (i.e.: the name attribute) for employees in Employee having a salary greater than $2000 per month who have been employees for less than 10 months. Sort your result by ascending employee_id. where employee_id is an employee's ID number, name is their name, months is the total number of months they've been working for the compa.. 2025. 3. 10. [SQL] 해커랭크 HackerRank 문제 풀이 Higher Than 75 Marks [SQL] hakerrank 문제 풀이문제Query the Name of any student in STUDENTS who scored higher than Marks. Order your output by the last three characters of each name. If two or more students both have names ending in the same last three characters (i.e.: Bobby, Robby, etc.), secondary sort them by ascending ID. 한국어 버전STUDENTS 테이블에서 75점보다 점수가 높은 학생의 Name 출력하라.각 이름의 마지막 3개 문자로 정렬하라.만약 마지막 3개 문자 이름이 같다면 ID를 .. 2025. 3. 8. 이전 1 다음
