Using the ER product for more substantial knowledge creates many complexity whilst planning a database product, So as a way to minimize the complexity Generalization, Specialization and Aggregation were being launched while in the ER product. These have been used for data abstraction. Through which an abstraction system is accustomed https://edgarcfgmd.timeblog.net/72410206/an-unbiased-view-of-case-study-solution