How to Refresh Data on a Schedule?
You can set scheduled refresh tasks for published data source extracts and published workbooks that connect to data extracts.
When you’re signed in to Tableau Server, display Content > Data Sources or Content > Workbooks, depending on the type of content you want to refresh.
Select the check box for the data source or workbook you want to refresh, and then select Actions > Extract Refresh.
In the Refresh Extracts dialog, select Schedule a Refresh, and complete the following steps:
Select the schedule you want.
If available, specify whether you want a full or incremental refresh.
By default, and if this option is not shown, a full refresh is run. Incremental refresh is available only if you configured it in Tableau Desktop before publishing the extract
Click the Schedule Refresh button.