Interactive lessons with exercises built into the browser. Covers SELECT through to subqueries. Best starting point for complete beginners. 2. SQLZoo — sqlzoo.net Looks dated. Do not let that put you ...

So, you’ve got a HackerRank test coming up, huh? It’s pretty common these days, with lots of companies using it to see if you can code. It can feel a bit daunting, but honestly, it’s just another ...

Thinking about getting into coding or leveling up your skills? You’ve probably heard of HackerRank. It’s a big name in the tech world for practice and hiring. But the big question on a lot of people’s ...

LeetCode focuses mainly on algorithms, while data science requires skills like SQL, statistics, and working with real data. Different platforms offer various ways to prepare, from building portfolios ...

we have a swipe table which keeps track of the employee login and logout timings. 1. Find out the time employee person spent in office on a particular day (office hours = last logout time - first ...

Taking up the HackerRank SQL certification has been a transformative experience that has helped me navigate the complexities of data analysis and shaped my SQL skills. I'll discuss my own path in this ...

This page contains solutions for all HackerRank Java challenges which were passed successfully. There can be multiple ways of approaching solution to any problem. Please find the provided solutions ...

class Rectangle: def __init__(self,breadth,length): self.breadth=breadth self.length=length def area(self): return self.breadth*self.length pass class Circle: def ...

Here are the 2 questions asked in HackerRank SQL Intermediate Certification Exam, these 2 will be available in one attempt. The questions asked are Invoices Per Country and Product Sales Per City.