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TDS Archive

An archive of data science, data analytics, data engineering, machine learning, and artificial intelligence writing from the former Towards Data Science Medium publication.

9 Tips That Helped Me Clear All HackerRank SQL Challenges in 2 Weeks

That will also help your SQL code challenges journey

11 min readOct 19, 2021

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All challenges cleared!
Photo by author

Current projects at work require more SQL skills, so I took the time to brush up my SQL knowledge using the HackerRank coding challenges platform. It took me a bit more than two weeks (on and off between work, workout, and taking the kid to day school, etc.) to finish all the 58 SQL challenges on the site, and I gained quite some insights from the journey (and having quite some fun doing that!). This article could be read by anyone who wants to get into the data science world or prepare for your next SQL interview using a coding site like HackerRank or LeetCode, Even if you still don’t have any prior SQL knowledge. I did put a bit of code in there to show you straightforward examples. Most of the tips are about making full use of these SQL challenges so you can benefit the most from them, rather than teaching you how to crack the problems. So don’t worry if you don’t know squash about SQL or coding. Please sit down, relax, and let’s do this.

Motivation

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Photo by Sylvester Sabo on Unsplash

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TDS Archive
TDS Archive

Published in TDS Archive

An archive of data science, data analytics, data engineering, machine learning, and artificial intelligence writing from the former Towards Data Science Medium publication.

Michael Li
Michael Li

Written by Michael Li

Data Scientist | Blogger | Product Manager | Developer | Pentester | https://www.linkedin.com/in/michael-li-dfw

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