Design an EER diagram for a Hospital Management System. The hospital wants to keep track of all their doctors, nurses, other staff, wards, patients and appointments. They have hired you to help them design the database for that purpose.   You can design your EER as you wish, but it must satisfy the following constraints:  a) there should be at least one disjoint-total specialization/generalization.  b) There should be at least five regular/strong entities [excluding subclasses] c) There must be a weak entity  d) There must be at least one M:N relationship. e) There must be at least one derived attribute.

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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.