5 Free Resources to Take Your SQL Skills Beyond SELECT Star

A wise data engineer once said 70% of SQL knowledge is easy to acquire; it’s the last 30% that proves the most challenging. Aside from picking up some tricks from colleagues, I’m almost entirely self-taught, which truly speaks to the quality and relevance of available free online learning material.

Image courtesy of Business Insider: https://www.businessinsider.com/how-to-learn-sql

Overall: Select Star



Offering original and aggregated data engineering content for working and aspiring data professionals. Content posted here generally falls into one of three categories: Technical tutorials, industry news and visualization projects fueled by data engineering.

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Zach Quinn

Data Engineer @ Forbes. Former journalist. The facts are the facts but opinions are my own.