Your entire business runs on a spreadsheet that Nathan built three years ago. Nathan left. Nobody knows how it works. But everyone knows that if it breaks during month end, the entire operation grinds to a halt. Sound familiar? I get it. You have a problem. You have Excel. You know how to use Excel. Why would you listen to the data guy ramble about something called "SQL" or "normalization"? Here's the go: we can skip the lecture about what you "should" be using. But please, j