Some databases and sources can contain primary AND secondary sources. To tell the difference, ask yourself if the person writing the article is giving a direct factual account of something they witnessed. If that's the case, then it is a primary source. If they are giving an opinion of something that already happened, or they are interpreting events that occurred (for example, interviewing someone who witnessed the event), then it is a secondary source.
It's sometimes hard to tell -- in which case, you can ask us (your Norco College Librarians) or your professor for more help.