Hi @Vincent,
Your data needs to reside in Caspio tables in order to work with it via Datapages.
You may check this article which explains how you can import your date:
https://howto.caspio.com/tables-and-views/importing-data/
You may also consider using REST API for transferring the data from you database into Caspio:
https://howto.caspio.com/web-services-api/rest-api/
Hope this helps.
Regards,
vitalikssssss