This question comes up from time to time: Which database am I supposed to use?
Because each database specializes in a different kind of resource, there is not one database that everyone should be searching all the time.
Students should start by searching in the main library search box on the library homepage. These search tabs allow students to search multiple databases at once, rather than each one on its own. This gives you the best chance to find something on your topic, no matter how obscure.
If you search only in one database, like CINAHL, you'll only see the stuff in that one database, which sometimes isn't very much!
However, if your professor has instructed you to use a specific database for an assignment, you should follow their instructions!