Have a look at the attached link-
https://techdocs.altium.com/display/...erence+DesignsDownload the examples, in there should be an example database library.
have a look at it, be aware that "Part Number" is a key field.
Following fields are a must-have in order for the library to fully function:
Library Ref
Library Path
Footprint Ref
Footprint Path
make sure your database library follows those guidelines;
if you still have problems feel free to ask