A database is a digital collection of data. There are databases with (scientific) articles, but also with legal texts, statistics, material data or standards.
Professional literature is written to keep the profession informed of current developments within the field and is usually written by professionals working in the field. Professional literature takes many forms, such as a book, dictionary, professional journal or a professional blog.
Professional magazines or professional journals are published at regular intervals in physical or digital form and are specifically focused on a particular industry or specialization.
Professional weblogs can be found on the Internet, but many specialist magazines in digital form also include a blog, in which experts in the field share information.