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When one - to - many relationship in E - R model is mapped into relational data model, the one - to - many relationship
When onetomany relationship in ER model is mapped into relational data model, the onetomany relationship is generally represented as
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b a foreign key
d a new table with a pair of foreign keys, each of which is associated with or references to the primary key in its parent table.
c a pair of primary key in one table and a foreign key in another table or the same table
a a primary key
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