title: Is there a standalone alternative to activerecord-like database schema migrations?
body: <p>Is there any standalone alternative to activerecord-like migrations. Something like a script that is able to track current schema version and apply outstanding migrations. Basically, these migration files could be just a plain SQL files, something like:</p>
  
  <pre>
  [timestamp]_create_users.sql
  reverse_[timestamp]_create_users.sql
  </pre>
  
  <p>Language of implementation isn't very important — it could be anything that is usually installed/pre-installed on *nix systems.</p>
  
  <p>I tried to find something out — but failed. I can certainly develop my own in an hour or two, but I am just curious — may be something nice is out there already.</p>