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



Posted By: Avi Date: 7 October 2009 02:51:09 AM
 Answer:

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.


Posted By: eTechPlanet


Date: 7 October 2009 02:51:09 AM
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