Please use the below steps to configure Incremental refresh in Tableau.
Step 1: Create your worksheet in Tableau.
Step 2: Select the option "Extract Data".
Step 3: Enable the Incremental refresh. Select the table and Column name.
Step 4: If you want a Full Refresh Select "Full Refresh" and click Extract.
Step 5: Click Extract -> Refresh(Incremental) If any data is added in db it will be added to your worksheet.
Step 6: Finally publish your Worksheet to the server.