Al-Hasmi Construction Company is having many projects. It wants to develop a database to keep track of project and employee. A PROJECT has a unique Proj-Id and PType (a project can have one or more ptype). The project is broadly classified in to Residential and Commercial. Residential recorded its Resident-Id. Similarly Commercial is recorded Commercial-Id. Commercial cannot be used as Residential. There are different type of Commercial, some of them are Industrial and Institutional. Industrial recorded its Indus-Code. Institutional recorded its Inst-Code. Sometimes Industrial can be used as Institutional. A Project is lead by exactly one Manager but a Manager can lead one or more Projects. A Manger has a unique Manger-Id.   Analyze the scenario and construct EER-Diagram, include participation constraint and disjoint or overall constraint.

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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.