Diagram entity relationship online dating

Posted by / 10-Nov-2017 23:01

Diagram entity relationship online dating

The paper concludes with a set of guidelines to refine an ERD to include normalization principles.Data modeling is an essential component of database design and development.It usually involves dividing an entity table into two or more tables and defining relationships between the tables.The objective is to isolate data so that additions, deletions, and modifications of an attribute can be made in just one table and then propagated through the rest of the database via the defined relationships.

An ERD developed during the conceptual data modeling phase of the database development process is generally transformed and enhanced through normalization principles during the logical database design phase.The ERD has received many extensions and variations, which are generally termed as Enhanced Entity Relationship (EER) model (Lenzerini & Santucci, 1983; Lenzerini & Nobili, 1990; Thalheim, 1998; Balaban & Shoval, 1999; Balaban & Shoval, 2002).In the last few years, the Unified Modeling Language (UML) emerged and became the defacto industry standard for many aspects of object modeling (Bock & Ryan, 1993; Booch, 1994; Fowler, 1997; Booch, Rumbaugh & Jacobson, 1999).This paper suggests inclusion of normalization during ERD development.Application of normalization during ERD development allows for more robust requirement analysis.

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Data modeling is performed during the initial phases of the database development process (also referred as database life cycle) as shown in Figure 1(Mannino, 2006; Rob & Coronel, 2006).