Scholarly articles are papers written by (usually multiple) experts in a subject and published in academic journals. The experts submit their papers to go through the peer-review process before being accepted and published.
A database is a collection of multiple academic journals that can all be searched at once. You can search a database by creating and submitting a search query. Based off your search query, you will get a list of articles (and other resources) as results.
You can find articles by searching a database, browsing a journal, or through citation mining.
Please see the page Searching Databases for tips and tricks on how to find articles in databases.