KnowledgeShare is an online platform that allows users to share and access educational resources for free. Users can create profiles, publish articles, and upload courses. Users can explore courses The app also integrates free online courses from platforms through web scraping.
add comments table that contains (id, #user_id, #course_id, #article_id, content (comment description))
bear in mind that course_id, and article_id, must be nullable as only one of them is selected per row