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Monday, July 7, 2008

How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?

One-to-One relationship can be implemented as a single table and rarely as two tables with primary
and foreign key relationships.
One-to-Many relationships are implemented by splitting the data into two tables with primary key and
foreign key relationships.
Many-to-Many relationships are implemented using a junction table with the keys from both the tables
forming the composite primary key of the junction table.

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