Not one database but over a dozen different databases on the EBSCOhost platform, covering a wide array of topics and sources, combined here to search them all at once.
Great for business, economics, nursing, health sciences, communication, education, literary studies, music, psychology, public administration, social work, and sports & exercise sciences.
Not as great for history, natural and applied sciences, the arts, philosophy, sociology, or magazines/newspapers.
Currently searches these databases:
Business Source Ultimate, CINAHL Complete, Civil War Primary Source Documents, Communication Source, Education Source, Library, Information Science & Technology Abstracts, Mental Measurements Yearbook with Tests in Print, MLA Directory of Periodicals, MLA International Bibliography, Music Index, APA PsycArticles, APA PsycInfo, Public Administration Abstracts, Social Work Abstracts, SPORTDiscus with Full Text, eBook Collection (EBSCOhost)