drupal/git/sql

http://drupal.org/documentation/git/faq
http://drupal.stackexchange.com/questions/29804/how-do-i-git-pull-a-dev-branch

PDO
http://api.drupal.org/api/drupal/includes%21database%21database.inc/function/db_query/7
http://drupal.org/developing/api/database
http://www.php.net/manual/en/class.pdostatement.php
http://joshaust.in/2012/06/entities-and-bundles-in-drupal-7/
http://drupal.org/node/937#b