[SQL][HackerRank] Higher Than 75 Marks

https://www.hackerrank.com/challenges/more-than-75-marks/problem?h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen

Higher Than 75 Marks | HackerRank

Query the Name of any student in STUDENTS who scored higher than 75 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 > 75 . If you look at the last three characters of each of their names, there are no duplicates and 'ley' < 'lia' < 'vet'.

 

• query student names ==> SELECT Name
• from STUDENTS table ==> FROM STUDENTS
• score higher than 75 Marks ==> WHERE Marks > 75
• order output by last three characters of name ==> ORDER BY RIGHT(Name, 3)
• secondary sort by ascending ID ==> ORDER BY RIGHT(Name, 3), ID

SELECT NAME 
FROM STUDENTS
WHERE MARKS > 75
ORDER BY RIGHT(NAME,3), ID;

예)  select left('abcde', 2)
    결과)    ab

예)  select right('abcde', 2) 
    결과)    de