Databases index (aka inventory, record, catalog) resources.
An index points to something.
Sometimes more than one database will point to the same articles/journals.
Example Article Citation: Iturriaga, Cristián, and Alys Young. “Deaf Students’ Translanguaging Practices in a Further Education College: Situating the Semiotic Repertoire in Social Interactions.” Journal of Deaf Studies & Deaf Education, vol. 27, no. 1, Jan. 2022, pp. 101–11.