Having a solid working toolkit of SQL knowledge really will make you seem very useful on a team. I do say "seem" though, in that if you weren't around it's not like the team would fail without you. It's not hard to learn SQL or Google around for a little bit to figure out what you're trying to accomplish. Sort of like that one guy on your team who's a wizard at regular expressions. He seems like a life saver in the m…
Complex git problems are another one that can really throw people sometimes.