Julia conducted a days of learning SQL contest. The start date of the contest was March 01, 2016 and the end date was March 15, 2016. Write a query to print total number of unique hackers who made at ...

Welcome to my repository of SQL solutions for all the challenges on HackerRank. This repository contains a comprehensive set of SQL queries for every problem I've solved on the platform, categorized ...

SELECT a.roll_number,a.name FROM student_information a INNER JOIN examination_marks b ON a.roll_number = b.roll_number GROUP BY b.roll_number HAVING SUM(b.subject_one + b.subject_two + b.subject_three ...