Hi Leandro,
By referring to your attached screen shot, i looks like the data you have in HANA E66 for client 800.However, you have created ABAP project NWH with client 001.
I believe that is reason why, you are able to see any data, because external view is a DDIC representation in ABAP for the underlying HANA view, when you call the same external view from ABAP, it will fetch records for the client which you logged in.
Hope this helps.
Best Regards,
Vaibhav