Hi Luis,
In general, you can build a process with first step as a custom connector to fetch the data from database(CLOUD SQL) and then pass the respective information to next activity as per business requirement. And you can initiate a sub-process based on outcome of a condition/gateway in a process.
Process can be triggered using a timer, e-mail, web service call (or) manually via web interface or Jquery.
Addition ref:
http://docs.runmyprocess.com/Developer_Guide/Process/TriggerRegards,
Murali