Databases are primarily collections of documents that you can search. They offer electronic access to many titles that have been compiled and cataloged by a reputable organization. K-State Libraries pays to subscribe to the databases, so the information found here is generally not freely available on the Internet.
Some databases include full text and PDF versions of articles. Other databases index citations that allow the user to navigate to the article via the purple "Get It" button in the item record for the article. The following databases provide a good starting point.