An ER diagram for a hospital management system visually represents the structure and relationships between different entities involved in hospital operations. It helps in understanding how data flows between departments, patients, doctors, and administrative units. The primary entities in this system typically include Patient, Doctor, Appointment, Hospital Staff, Room, Treatment, Bill, and Medicine. Each of these entities stores specific information crucial for efficient hospital management.For instance, the Patient entity contains details like patient ID, name, contact number, age, gender, and medical history. The Doctor entity includes attributes such as doctor ID, name, specialization, phone number, and assigned department. The Appointment entity connects patients with doctors, storing information like appointment ID, date, time, and reason for the visit. The Room entity manages data on room number, type, availability, and assigned patients, ensuring proper bed management. The Treatment and Medicine entities record details related to prescribed treatments, medications, dosages, and costs associated with each patient’s case.