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Analysis and Design
After identification of entities and their attributes, the next stage in ER
data modeling is to identify the relationships between these entities.
We can say a relationship is any association, linkage, or connection between
the entities of interest to the business. Typically, a relationship is indicated
by a verb connecting two or more entities. Suppose there are two entities of our
library system, member and book, then the relationship between them can be “borrows”.
Member borrows book
Each relationship has a name, degree and cardinality. These concepts will be
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