Hi Spoorthi,
There are multiple options available as data source
1. Database
-Which retrieve all the entity information from data base which you associated.
2. X-Path
-X path option can be a filter or a condition which we can do on the selected entity information.
3. Association
-If your page has the context entity that associated as one to many relation, you can traverse using that association.
4. Microflow
-You can create a new microflow which will return the required data for that list view, at the end you should return a list.
5.Nanoflow
-Same as Microflow you should return list at the end.
For more detailed information Visit,
https://docs.mendix.com/refguide/data-sources/
Hope this helps!
Regards,
Sathya Reddy