You can configure how to import and fetch incremental data from your databases using the Import configuration option. Select the Click here link to set the import configuration. 

Below is a snapshot from the schedule configuration.

How to import data from source? Select the way you would like to import your data from the drop-down - Import all data, Incremental file fetch, Do not import data.

Import all data

This option will import all available data for every run.

Incremental data fetch

Important: This incremental fetch option is not available when the data is imported using a query from databases.

Only modified and new data

To import the modified and new data incrementally from the last imported time, select Only modified and new data option from the drop-down.

Fetch based on: You can enter the date-time column name based on which the file must be sorted and imported.

Use the previously imported data if no new data is available: 

1. If the checkbox is checked: When there is no new data in the source, the last fetched data will be imported again.
2. If the checkbox is unchecked: When there is no new data in the source, the import will fail and no files will be imported. This will, in turn, cause the entire pipeline job to fail.

Do not import data

The data is imported only once. The second time, the rules get applied to the same data and get exported.