By coincidence I was just looking for the same thing. Check:
http://wiki.rubyonrails.com/rails/pages/UnderstandingMigrations
http://wiki.rubyonrails.com/rails/pages/UnderstandingMigrations
(which
links to: Peak Obsession
http://wiki.rubyonrails.com/rails/pages/UsingMigrations )
It was the first thing that popped up when I googled for ‘rails
migrations’.
And by the way: although I’m not that fond of most other ms products, I
can
actually honestly vouch for sqlserver and if given the choice (and if
cost
would be the same) I’d probably prefer it over mysql when it needs to be
deployed on an ms Windows server.
Piet.