draw an ER diagram of the database to manage daily medical examination and treatment in the hospital (not interested in inpatient treatment): - The hospital has many doctors and nurses from different departments. Each doctor and nurse belongs to only one department - The patient when he comes to the doctor will be created a patient record if it is the first visit - Each visit will be made a medical record and assigned an initial clinic. Each visit is attended by a doctor and an assistant nurse. - The doctor may ask the patient to perform tests, x-rays, endoscopy, .... - After the results are available, the patient returns to the original clinic for the doctor to read the results and prescribe medicine if any - Patients can buy medicine in the hospital pharmacy or buy it outside

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.