I connected a database through configuration. When I try to add input source and sourcetype, I do not get any results. I even tried creating my own sourcetype.
Here is what the documentation specified:
Source: Optional. The input name will be used if you leave it blank.
Source type: Enter a sourcetype field value for Splunk Enterprise to assign to queried data as it is indexed. Click the field and enter a value, or choose an existing value from the menu that appears.