NSDN (Software Developer Community) Starts Updating — Welcome to Visit
Through multiple interviews and job hunting, reviewing and learning professionally is essential, but materials found online were messy, so I got the idea of collecting and organizing materials, thus founded NSDN, collecting and organizing software development materials on the internet, and also built a forum for discussion and interaction. 
NSDN.NEILREN.COM Latest status: the C# part has been updated; the Java part is being updated; the SQL part can’t be published because the server uses Alibaba Cloud’s application engine, not our own server, and Alibaba Cloud’s firewall intercepts SQL keywords, preventing publication. Planning to update locally first, then batch-add to the database, or connect to the database locally to publish. The SQL tutorials may be updated later; looking for a way. If you have suggestions while browsing, or find errors, please screenshot and contact me. Thank you very much.