In the bigger picture functional programming has made huge inroads. Facebook has a Haskell team whose product handles up to 1 million requests per second, and it's also in production at AT&T, Microsoft, Google, Barclays, New York Times and many smaller outfits. The other day I read about a Haskell-like language being used for high-speed, low-latency trading for a hedge fund.

But there are probably at least 100x more SQL developers out there.