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Module 1: Database System Architecture

201910m

Discuss the correspondence between E-R model construct and the relation model construct. Show how each E-R model construct can be append to the relational model using the following description of an organization:

An organization uses number of items of an equipment to produce goods. Each item is at one LOCATION, of one TYPE and has a DETAILED_DISCRIPTION. Faults on the equipment are identified by a unique FAULT_ID and are reported at a TIME_REPORTED. Any number of persons may be assigned to a fault and work on the fault until it is fixed. The TIME_FIXED is recorded as the TIME_SPENT by each person on a fault. Any number of parts may be used to repair a fault. The QTY_USED of each part is recorded against the fault. Each part is identified by a PART_ID and has a given weight and MAX_DIMENSION and can have any number of colors.

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