5 Common SQL Interview Problems for Data Scientists

Helping you develop your SQL skills to ace any interview:

While it’s not the sexiest part of the job, having a strong understanding of SQL is essential to succeed in any data-focused job. The truth is that there’s way more to SQL than SELECT FROM WHERE GROUP BY ORDER BY. The more functions you know, the easier it’ll be for you to manipulate and query anything you want.

There are two things I hope to learn and communicate in this article:

1. Learn and teach SQL functions beyond the basic fundamentals
2. Go through a number of SQL interview practice problems

These questions are taken from none other than Leetcode! Go check it out if you haven’t yet!

Table of Content

• PROBLEM #1: Second Highest Salary
• PROBLEM #2: Duplicate Emails
• PROBLEM #3: Rising Temperature
• PROBLEM #4: Department Highest Salary
• PROBLEM #5: Exchange Seats