Itqualityassurance
- How do you deal with many-to-many relationships?
- How to implement many-to-many relationship in SQL?
- Can a table have a many-to-many relationship with itself?
- What is an example for many-to-many relationship?
How do you deal with many-to-many relationships?
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 to implement many-to-many relationship in SQL?
When you need to establish a many-to-many relationship between two or more tables, the simplest way is to use a Junction Table. A Junction table in a database, also referred to as a Bridge table or Associative Table, bridges the tables together by referencing the primary keys of each data table.
Can a table have a many-to-many relationship with itself?
A self-referencing many-to-many relationship exists when a given record in the table can be related to one or more other records within the table and one or more records can themselves be related to the given record.
What is an example for 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.
