Update connector-azure-sql-database.md

Included a line for clarification on schema drift

Author: KrishnakumarRukmangathan

articles/data-factory/connector-azure-sql-database.md

@@ -808,7 +808,7 @@ Settings specific to Azure SQL Database are available in the **Source Options**
 
 :::image type="content" source="media/data-flow/isolationlevel.png" alt-text="Isolation Level":::
 
-**Enable incremental extract**: Use this option to tell ADF to only process rows that have changed since the last time that the pipeline executed.
+**Enable incremental extract**: Use this option to tell ADF to only process rows that have changed since the last time that the pipeline executed.To enable incremental extract with schema drift, choose tables based on Incremental / Watermark columns rather than tables that are enabled for Native Change Data Capture.
 
 **Incremental column**: When using the incremental extract feature, you must choose the date/time or numeric column that you wish to use as the watermark in your source table.