About the instructor

Welcome to this course! 😃

Hi, thanks for visiting this course!

My name is Leon, most recently I was a senior data science manager at  Apple, and I can't emphasize enough how important SQL is during the hiring process.

Before my current position, I worked as head of data science at the education technology company Chegg, so I understand the skills gap between the real job requirements vs. college education, and that is the major reason why I created a data scientist school. 

Before I moved to Silicon Valley, I worked as a research scientist for Amazon, focusing on building large-scale machine learning systems.

My goal is to help new college students master the necessary technical skills to land their first job. Or help young professionals become more productive and excel at their full-time job.

As a hiring manager or part of a hiring committee, I have interviewed thousands of candidates, conducted thousands of SQL interviews for data scientists, data analysts, data engineers, product managers, machine learning engineers.

In this course, I will teach you the common patterns in SQL interviews, and give you an edge to ace your next SQL interview. 


Why did I create this course?

SQL is the #1 programming language for data management in the industry, but in my 14 years career as a data professional, most of the data scientists that I know including myself, have never mastered SQL during formal college education.

That’s why I created this course to help you become better at SQL, and write beautiful, professional SQL queries to nail your next SQL Interview.


Let's get started!