[MYSQL] Hackerrank - Higher Than 75 Marks

https://www.hackerrank.com/challenges/more-than-75-marks/problem

Higher Than 75 Marks | HackerRank

문제

Query 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.

Input Format

The STUDENTS table is described as follows: 

 The Name column only contains uppercase (A-Z) and lowercase (a-z) letters.

Sample Input

Sample Output

Ashley
Julia
Belvet

Explanation

Only Ashley, Julia, and Belvet have Marks > . If you look at the last three characters of each of their names, there are no duplicates and 'ley' < 'lia' < 'vet'.

 

생각해보기

특정 글자만 가져오는 함수에는 LEFT, RIGHT, SUBSTRING이 있다.

@STR = 'HAPPY' 일 때

LEFT(STR,2) = 'HA'

RIGHT(STR,2) = 'PY'

SUBSTRING(STR, 1, 2) = 'AP'

가 된다.

 

코드

select name
from students
where Marks > 75
order by right(name, 3) asc, id asc;