Introduction to Data Modelling
Data Modelling defines the primary data object, their attributes and their relationships with other primary data objects. It also defined relationship between objects and the processes that transform them. In order define the objects and their relationship; it makes use of entity relationship diagrams. ERD helps in defining as well as identifying hem and their relationships using graphical notations. ERD defines all the data that are stored entered transformed and produced within an application.
Data modelling considers data independently of the processes that transforms data. Now, we will proceed to discuss the data. Objects, their attributes and relationships, cardinality and modality, entity relationship diagram in the followings sections.
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