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