7.Solution of Hacker Rank The Report
Author: neptune | 23rd-Jan-2023
The Report
Problem Statement : You are given two tables: Students and Grades. Students contain three columns ID, Name and Marks.
Sample Input data of Students table:
Grades contains the following data:
Ketty gives Eve a task to generate a report containing three columns: Name, Grade and Mark. Ketty 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.
Expected output :
Maria 10 99
Jane 9 81
Julia 9 88
Scarlet 8 78
NULL 7 63
NULL 7 68
Solution :
For this challenge, we must:
Use an if condition to assign NULL for lower grades.
Assign grades using the WHERE and BETWEEN clause so that records where Marks between MIN_Mark and Max_Mark joins and return a joined table.
Query :
SELECT IF(GRADE < 8, NULL, NAME), GRADE, MARKS
FROM STUDENTS JOIN GRADES
WHERE MARKS BETWEEN MIN_MARK AND MAX_MARK
ORDER BY GRADE DESC, NAME;
Output:
Hope you learn something !!!
If you have any questions let me know in the comment section.
#JavaScript #Python #Hackerrank #AI #Motivation #React.js #Interview #Testing #SQL #Selenium #LeetCode #Machine learning #Problem Solving #IT #API #Java #GPT #AWS #Algorithms #Certifications #Github #TCS #Projects #Jobs #Django #Microservice #Node.js #Google #Story #Pip #Data Science #Postman #Health #Twitter #Elon Musk
5. Solution of Hacker Rank Weather Observation Station 8.Author: neptune | 18th-Aug-2024
#SQL #Hackerrank
Query the list of CITY names from STATION which have vowels (i.e., a, e, i, o, and u) as both their first and last characters. Your result cannot contain duplicates...
The Blunder | HackerrankAuthor: neptune | 21st-Nov-2022
#SQL #Hackerrank
Write a query calculating the amount of error (i.e.: average monthly salaries), and round it up to the next integer...
Identifying the Odd One Out in a Series of Strings | HackerrankAuthor: neptune | 15th-Jun-2023
#Hackerrank #Problem Solving
The article presents an algorithm to identify the odd one out in a series of strings efficiently...
4. Solution of Hacker Rank Weather Observation Station 6.Author: neptune | 23rd-Jan-2023
#SQL #Hackerrank
Query the list of CITY names starting with vowels (i.e., a, e, i, o, or u) from STATION. Your result cannot contain duplicates...
3. Solution of Hacker Rank Weather Observation Station 4.Author: neptune | 23rd-Jan-2023
#SQL #Hackerrank
Problem Statement : Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table...
The PADS | HackerrankAuthor: neptune | 21st-Nov-2022
#SQL #Hackerrank
Problem Statement: Generate the following two result sets: 1. Query an alphabetically ordered list of all names in OCCUPATIONS, immediately followed by the first letter of each profession...
6. Solution of Hacker Rank Employee Salaries.Author: neptune | 23rd-Jan-2023
#SQL #Hackerrank
Problem Statement : Query that prints a list of employee names for employees in Employee having a salary greater than $2000 per month and experience less than 10 months...
1. Basic SQL Select Query of Hacker Rank.Author: neptune | 20th-Apr-2022
#SQL #Hackerrank
Problem Statement : Query all columns for all American cities in the CITY table with populations larger than 100000. The CountryCode for America is USA...
Generate Fibonacci Sequence - JavaScript | HackerankAuthor: neptune | 07th-Apr-2023
#JavaScript #Hackerrank
Write a JavaScript function fibonacciSequence() to generate a FIbonacci sequence...
2. Solution of Hacker Rank Weather Observation Station 3.Author: neptune | 23rd-Jan-2023
#SQL #Hackerrank
Problem Statement : Query a list of CITY names from STATION for cities that have an even ID number. Print the results in any order, but exclude duplicates from the answer...
Team Formation Hackerrank | JuliaAuthor: neptune | 13th-Apr-2023
#Hackerrank
HackerRank is organising a chess tournament for its employees. There are n employees, having IDs 1, 2, n, where the employee has a rating of rating...
Modified 0-1 knapsack problem | Frsco Play HackerrankAuthor: neptune | 05th-Nov-2023
#Hackerrank #Problem Solving
An automobile mechanic wants to buy a set of spare parts from a manufacturing unit. Goal is to maximise the amount of money the mechanic can earn...
Weather Observation Station 18 | HackerrankAuthor: neptune | 18th-Apr-2023
#SQL #Hackerrank
In this problem, we need to find the Manhattan Distance between two points P1(a,b) and P2(c,d)...
Solving the Ice Cream Parlor Problem | HackerrankAuthor: neptune | 04th-Jun-2023
#Hackerrank #Problem Solving
Two friends like to pool their money and go to the ice cream parlour. They always choose two distinct flavours and they spend all of their money...
AngularJS - Know Tech Frameworks | Fresco PlayAuthor: neptune | 05th-Nov-2023
#Hackerrank #Problem Solving
Build an application that displays the framework details using AngularJS routing. We will build an application that displays the Tech Frontend and Backend frameworks...
Top Earners | HackerRankAuthor: neptune | 23rd-Nov-2022
#SQL #Hackerrank
Write a query to find the maximum total earnings for all employees as well as the total number of employees who have maximum total earnings...
Backspace String Compare using R | Fresco PlayAuthor: neptune | 05th-Nov-2023
#Hackerrank #Problem Solving
The code implementation in both R and Python solves the "Backspace String Compare" problem using stack data structure...
PySpark Milestone Black Friday Sales Data | Fresco Play HackerrankAuthor: neptune | 05th-Nov-2023
#Data Science #Hackerrank
Welcome to the Spark Challenge. You are provided with the Black Friday sales data and we as a big data developer needs to analyze and fetch the required data...
30+ SQL Interview QuestionsAuthor: neptune | 05th-Jan-2023
#Interview #SQL
Data Definition Language (DDL) – It allows end-users to CREATE, ALTER, and DELETE database objects...
Python - Number Based Problem | HackerrankAuthor: neptune | 17th-Aug-2023
#Hackerrank #Problem Solving
Determine whether the number in descending order is a prime or not. If the number is a prime, then print "Sorted Number is a prime number," otherwise, print "Sorted Number is not a prime number."..
View More