Free SQL and Database Course - KDnuggets

SQL is one of the most desired and useful languages that a data scientist -- or programmer of any stripe, for the matter -- can posses knowledge of. SQL may well be a data scientist's best friend, and for good reason. The biggest piece of advice I can give aspiring data scientists is to learn SQL. This is an often-overlooked skill by most data science learning providers but is arguably as important as machine learning modeling. To further quantify, the TIOBE Index for September 2022, an indicator of the popularity of programming languages, places SQL at position number 9 of all programming languages.