HackerRank SQL

New Companies

Problem:

Amber’s conglomerate corporation just acquired some new companies. Each of the companies follows this hierarchy:

Given the table schemas below, write a query to print the company_code, founder…

HackerRank SQL

Challenges

Problem:

Julia asked her students to create some coding challenges. Write a query to print the hacker_id, name, and the total number of challenges created by each student. Sort your results by the total number of challenges in…

HackerRank SQL

Higher Than 75 Marks

Problem:

HackerRank SQL

Top Competitors

Problem:

Julia just finished conducting a coding contest, and she needs your help assembling the leaderboard! Write a query to print the respective hacker_id and name of hackers who achieved full scores for more than…

HackerRank SQL

Interviews

Problem:

HackerRank

Ollivander’s Inventory

Problem:

HackerRank SQL

Contest Leaderboard

Problem:

HackerRank SQL

Weather Observation Station 18

Problem:

HackerRank SQL

Weather Observation Station 19

Problem:

HackerRank SQL

Symmetric Pairs

Problem: