Regular Expressions, or Regex, are not unique to the Business Intelligence (BI) world, but they are something I frequently encounter and often find puzzling. I wish I had a handy cheat sheet whenever I need to use Regex in my formulas, but I can never find a concise and helpful one through Google searches. So, I decided to create one for people like me who don’t necessarily struggle with Regex but are often annoyed by its complexity.