[loudmax]

This is the second time this site has appeared on HN, and both times I've mis-read the title as "PostgreSQL vs MySQL", which I think would be a much more interesting comparison. If you're already working in an MS shop, then MS SQL will work best with what you have. If you're working in an open source environment, then you'll be better off taking advantage of what Postgres or MySQL have to offer. Postgres and MySQL are so different in terms of their features that comparing them would make an interesting article.