Database tools

https://code.google.com/p/wwwsqldesigner/

How to do big migrations safely

1. https://matthew.mceachen.us/blog/how-to-make-breaking-changes-and-not-break-all-the-things-1315.html
2. http://robertheaton.com/2015/08/31/migrating-bajillions-of-database-records-at-stripe/