Kick off sync from SQL side

I am in the process of connecting an existing FileMaker database to a SQL server that is behind a web interface.  I wanted to know if there is a way to send a command from the web interface to kick off a sync.

For example, a user opens a record on the web, makes some changes, hits a save button.  

 How do I get that "Save" to trigger a sync?

And can I get it to sync that single record or do I need it to sync all records that have changed?

Thanks in advance,

Mike