Through a library catalog, you can find all the materials owned by the library in all formats. Databases specialize on areas of knowledge. You can have a database of images (photography, paintings, architecture,) a database of videos and audio visuals and a database of news articles around the world. Many databases contain full text scholarly articles.
Scholarly articles are published in Academic Journals. They are considered secondary sources because they provide commentary and analysis about primary sources. Primary sources relate to first hand creations such as films, archival papers, photography, manuscripts, government paper, diaries or things you might find in our Special Collections & Archives. In other words, primary sources refer to original sources.