# Incremental Synchronization

Incremental synchronization uses a user-specified field in your data source to track data over time.  Fields must be in the form of a primary key, numeric, or date/time value.  Each time an incremental synchronization occurs, only new data is ingested.  New data includes those records with values larger than the highest order record from the previous synchronization.

![](/files/pDvjEbEDovqVSxfi6yNl)

**Supported Data Sources**

* SQL Databases
* NoSQL Databases
* APIs


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