The Report SQL – Hacker Rank Solution

The Report SQl - Hacker Rank Solution
The Report SQl – Hacker Rank Solution

Problem

You are given two tables: Students and GradesStudents contains three columns IDName and Marks.

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Grades contains the following data:

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Ketty gives Eve a task to generate a report containing three columns: NameGrade and MarkKetty doesn’t want the NAMES of those students who received a grade lower than 8. The report must be in descending order by grade — i.e. higher grades are entered first. If there is more than one student with the same grade (8-10) assigned to them, order those particular students by their name alphabetically. Finally, if the grade is lower than 8, use “NULL” as their name and list them by their grades in descending order. If there is more than one student with the same grade (1-7) assigned to them, order those particular students by their marks in ascending order.

Write a query to help Eve.

Sample Input

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Sample Output

Maria 10 99
Jane 9 81
Julia 9 88
Scarlet 8 78
NULL 7 63
NULL 7 68


Note

Print “NULL”  as the name if the grade is less than 8.

Explanation

Consider the following table with the grades assigned to the students:

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So, the following students got 89 or 10 grades:

  • Maria (grade 10)
  • Jane (grade 9)
  • Julia (grade 9)
  • Scarlet (grade 8)


The Report SQl – Hacker Rank Solution

SELECT IF(g.Grade<8, NULL, s.Name), g.Grade, s.Marks FROM Students AS s
JOIN Grades AS g ON s.Marks BETWEEN g.Min_Mark AND g.Max_Mark ORDER BY g.Grade DESC, s.Name, s.Marks;

Disclaimer: The above Problem (The Report) generated by Hackerrank but the Solution is Provided by Chase2Learn. This tutorial is only for Educational and Learning purposes. Authority if any of the queries regarding this post or website fill the following contact form thank you.

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