Can we use more than 2 datasets as source in Lumira?

Hi,

I would like to know if we can use MORE than 2 data sources in Lumira?

Example-

1. Can I use 2 .xls files, SAP HANA view as data sources?
2. Can I use 3 .xls files as sources?

Is it possible? If yes, how can i merge or join more than 2 data sources?

Please let me know.

Thanks.