This entity relationship diagram models a feature-rich chat application with entities like Users, Messages, Chats, Groups, Attachments, Contacts, Notifications, and Group Members. Users send messages via one-on-one or group chats. Each message may include attachments, timestamps, and status flags. Group chats are moderated by admins and include mute/block settings for members.
Contacts represent social connections between users, while Notifications alert users to new messages or actions. This ER diagram supports scalable, real-time communication with robust relationship mapping. It’s ideal for developers creating modern messaging platforms with multimedia support, user controls, and chat history management.
