HackerRank

SQL

WHERE문 해커랭크 예제 풀이(DISTINCT, NOT LIKE)

1. https://www.hackerrank.com/challenges/revising-the-select-query/problem?isFullScreen=true Revising the Select Query I | HackerRank Query the data for all American cities with populations larger than 100,000. www.hackerrank.com Q: Query all columns for all American cities in the CITY table with populations larger than 100000. The CountryCode for America is USA. The CITY table is described as f..

SQL

SELECT/FROM/LIMIT + 해커랭크 예제

모든 데이터 가져오기 SELECT * FROM 테이블명 예제: https://www.hackerrank.com/challenges/select-all-sql/problem?isFullScreen=true Select All | HackerRank Query all columns for every row in a table. www.hackerrank.com Q: Query all columns (attributes) for every row in the CITY table. The CITY table is described as follows: A: SELECT * FROM city !! 가독을 위해 명령어는 대문자로, 테이블명이나 칼럼명은 소문자로 써준다. 특정 칼럼의 데이터 가져오기 SELECT 칼럼..

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