During the long months of the pandemic, when silence filled the streets and time itself seemed to pause, I found structure in something that never stood still: data. I spent more than a year studying ...

SQL feels OVERWHELMING because it looks like one skill. It’s actually three PROBLEMS mixed together. You’re not alone if it feels “random” at first. Most people study a cheat sheet and practice ...

Data engineers who read and review SQL every day, but still run into inherited production queries that are painful to reason about. You've got a 150-line query, an INSERT ... SELECT, a MERGE, or a ...