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- What is an example of a many-to-many relationship?
- What is a contact relationship?
- How do you resolve many-to-many relationship between entities?
- How do you do many to many relationships?
What is an example of a many-to-many relationship?
A many-to-many relationship exists when one or more items in one table can have a relationship to one or more items in another table. For example: Your Order table contains orders placed by multiple customers (who are listed in the Customers table), and a customer may place more than one order.
What is a contact relationship?
A contact relationship is a named connection between one contact and another. For example, two contacts, Bob and Mary have a single relationship: Mary is Bob's Father. This relationship is unidirectional (i.e. a directed relationship from one contact to another).
How do you resolve many-to-many relationship between entities?
Many-to-many (m:n) relationships add complexity and confusion to your model and to the application development process. The key to resolve m:n relationships is to separate the two entities and create two one-to-many (1:n) relationships between them with a third intersect entity.
How do you do many to many relationships?
A many-to-many relationship occurs when multiple records in a table are associated with multiple records in another table. For example, a many-to-many relationship exists between customers and products: customers can purchase various products, and products can be purchased by many customers.
