> For the complete documentation index, see [llms.txt](https://docs.verbdata.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verbdata.com/data-sources/data-synchronization/synchronization-methods/change-tracking.md).

# Change Tracking

Change tracking synchronization uses the built-in Change Tracking features supported by Microsoft SQL Server.  Net changes are queried and applied to the ingestion store each time a synchronization occurs.  This is a highly optimized process given only changed data is queried.  

Change Tracking requires the underlying RDBMS have the feature enabled prior setting up the synchronization with Verb.

![](/files/LHbY8cE7swsvbKAsdtma)

**Supported Data Sources**

* Microsoft SQL Server