Uploaded March 2022 | Updated September 2026, 1 hour ago

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This video covers two of the most common SQL Rank Functions, their differences, and how to use them. We’ll take the following two example questions from data science interviews which shows the crucial reasons to use RANK and DENSE_RANK SQL window functions.


Link to the questions:
1. platform.stratascratch.com/coding/10148-find-the-top-10-cities-with-the-most-5-star-businesses?python=&utm_source=youtube&utm_medium=click&utm_campaign=YT+description+link
2. platform.stratascratch.com/coding/10159-ranking-most-active-guests?utm_source=youtube&utm_medium=click&utm_campaign=YT+description+link

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Timeline:

Intro: (0:00​​​)
Interview Question #1: (0:25)
Interview Question #2: (6:24)
Conclusion: (9:02​​)
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About The Platform:

I'm using StrataScratch (platform.stratascratch.com/coding?utm_source=youtube&utm_medium=click&utm_campaign=YT+description+link), a platform that allows you to practice real data science interview questions. There are over 1000+ interview questions that cover coding (SQL and python), statistics, probability, product sense, and business cases.

So, if you want more interview practice with real data science interview questions, visit platform.stratascratch.com/coding?utm_source=youtube&utm_medium=click&utm_campaign=YT+description+link. All questions are free and you can even execute SQL and python code in the IDE, but if you want to check out the solutions from me or from other users, you can use ss15 for a 15% discount on the premium plans.

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Contact:

If you have any questions, comments, or feedback, please leave them here!
Feel free to also email me at nathan@stratascratch.com
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