Question: What is referential integrity Describe how it is enforced when
What is referential integrity? Describe how it is enforced when a new foreign key value is created, when a row containing a primary key is deleted, and when a primary key value is changed.
Answer to relevant QuestionsWhat types of data (or fields) should never be stored more than once in a relational database? What types of data (or fields) usually must be stored more than once in a relational database?What is an object identifier? Why are object identifiers required in an object database?What is the difference between a primitive data type and a complex data type?Assume that RMO is developing its database using object-oriented methods. Assume further that the database designers want to make some changes to the class diagram in Figure (a). Specifically, they want to make Product Item ...1. Update the RMO relational database design in Figure based on the changes that you made to the ERD. Be sure that all your database tables are in 3NF.2. Write ODL schema specifications for all new classes and relationships ...
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